summaryrefslogtreecommitdiff
path: root/macros/latex/contrib/metre/metre.dtx
blob: 6a918778227f01892898fc1f870ff2866dd2780f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
% \iffalse meta-comment
%
% metre.dtx
% Copyright 2000 2001 Gianfranco Boggio-Togna
% 
% This program may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version~1.2
% of this license or (at your option) any later version.
% The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.2 or later is part of all distributions of LaTeX  
% version 1999/12/01 or later.
%
% This program consists of the files metre.dtx and metre.ins
%
%<*driver>
\documentclass[11pt]{ltxdoc}
\setlength{\parindent}{0pt}
\setlength{\parskip}{\medskipamount}
\usepackage{metre}
\MakeShortVerb{|}
\def\M@yields{ yields\kern .15em\relax}
%\EnableCrossrefs
%\CodelineIndex
\DisableCrossrefs
% To get the documented source of the package, comment out
% the next line and uncomment the following one.
\OnlyDescription
%\AlsoImplementation
\begin{document}
  \renewcommand{\IndexMin}{100ex}
  \setcounter{IndexColumns}{2}
  \renewcommand{\usage}[1]{#1}
  \IndexPrologue{\section{Index of commands} The index does not include %
   the commands listed on pp. \pageref{metsym} and \pageref{accsym}}
  \DocInput{metre.dtx}
  \PrintIndex
\end{document}
%</driver>
%
% \fi
%
% \CheckSum{5562}
%
% \title{{\LARGE\tt metre.sty}\\
%         A \LaTeX{} package for classicists\\
%         {\small Version 1.0\ \ (2001/12/05)}\\}
% \author{Gianfranco Boggio\,--Togna
%         \thanks{Author's address: C.P. 14021, I-20140 Milano}\\
%         \textsl{gbt\kern .08em @\kern .1em acm.org}}
% \date{}
% \maketitle
% \vspace{-2ex}
% \begin{center}
% \begin{minipage}{.7\linewidth}
% \small\it
% \begin{center}
% Questo piccolo lavoro \`e dedicato ai\\
% miei insegnanti di greco e latino del\\
% Liceo Ginnasio `Girolamo Rossi' di Ventimiglia.
% \end{center}
% \end{minipage}
% \end{center}
% \vspace{2ex}
% \section*{License}
% \noindent \copyright\ Copyright 2000 2001 Gianfranco Boggio\,--Togna.\par
% This program may be distributed and/or modified under the
% conditions of the \LaTeX{} Project Public License, either version~1.2
% of this license or (at your option) any later version.
% The latest version of this license is in
% \texttt{http://www.latex-project.org/lppl.txt}
% and version 1.2 or later is part of all distributions of \LaTeX{} 
% version 1999/12/01 or later.\par
% This program consists of the files \texttt{metre.dtx} and 
% \texttt{metre.ins}.
% \section*{Acknowledgement}
% The author wishes to thank Dr.~Rainer Thiel of
% Philipps--Universit\"at, Marburg, for providing him with
% much material and expert advice on the \textit{arcana}
% of classical philology.  Without Dr.~Thiel's
% assistance, the package would never have seen
% the light of day.
%
% \newpage
%
% \section*{Introduction}
%
% The package provides classicists with some of the tools that are needed
% for typesetting scholarly publications dealing with Greek and Latin
% texts, with special emphasis on Greek verse.
%
% As the name suggests, the core of the package is a comprehensive set of
% commands for generating metrical schemes and for placing prosodical marks
% on text set in the Latin or the Greek alphabet.
%
% The rest of the package provides a miscellany of commands for symbols
% (most of them not directly related to metre) that are often used
% in critical editions of classical texts.
%
% The package does not require any special font: all symbols are taken
% from the Computer Modern OT1 fonts (included in all distributions of
% \TeX) or are generated by means of \TeX{} primitives.
%
% \section*{Notation}
%
% The notation used for quantities that can appear as command arguments
% is that of \textit{The \TeX{}book}:
% \begin{tabbing}
% mmmm\=mmmmmmm\=\kill
% \>\meta{dimen}\>a legitimate \TeX{} dimension.\\ 
% \>\meta{number}\>a (signed) integer.\\
% \>\meta{factor}\>a (signed) decimal constant.\\
% \end{tabbing}
%
% Many commands accept an \meta{optional argument} that can be used 
% to modify the effect of the command. The \meta{optional argument}
% is specified according to the usual \LaTeX{} conventions: within
% square brackets, after the command name.
% \newpage
% \tableofcontents
%
% \newpage
%
% \section{Package option\label{option}}
% 
% The package has one option, which can be specified in the usual way
% within square brackets (e.g.~|\usepackage[en]{metre}|). The option
% determines the vertical placement of the metrical symbols generated
% by |\metra|.
% 
% The default style is the one that is commonly used in Germany
% (and universally in Italy). The base of the metrical symbols is aligned
% with the baseline of the surrounding text and composite symbols are
% built upwards from the baseline: \metra{\m\b\bm\mb\bbm}.
% 
% The |en|\footnote{%
% |En| selects the same style as |en| with one difference:
% the \textit{macron} in \metra{\bbmb} is placed on the horizontal axis 
% \metra[\ms{En}]{\m\bbmb\m}\,, while the |[en]| option puts the  
% \textit{breve} on the axis \metra[\ms{en}]{\m\bbmb\m}\,.}
% option selects an alternative style which is usual in  English typography
% (for instance, in books published by Oxford University Press).
% The horizontal axis of the metrical symbols is aligned with the axis of
% characters such as |=| in the surrounding text and symbols, whether
% simple or composite, are roughly symmetrical with respect to the
% axis: \metra[\ms{en}]{\m\b\bm\mb\bbm}.
% 
% You can change the style \label{style} at any time with the  
% |\MetraStyle| command (see sect.~\ref{metrastyle}).
%
% \newpage
%
% \section{Metrical notation}
%
% \subsection{The \texttt{\protect\bslash metra} command}
%
% \subsubsection{Metrical symbols\label{metra}}
%
% The |\metra| \DescribeMacro{\metra} command takes one argument and
% generates the metrical scheme defined by the commands given within the
% argument.
%
% The list of metrical symbols and corresponding commands is on page
% \pageref{metsym}; it includes all the symbols (marked [\textit{W}] in
% the table) used by M.\,L.~West in \textit{Greek Metre} (Oxford, 1982).
% The commands for metrical symbols are defined only within the argument
% of |\metra| and are not available outside it.  The text typeset by
% |\metra| is never split across lines; if it does not fit within the line,
% \TeX{} gives an |Overfull box| message.
%
% The |\r|, |\R|, |\t| and |\T| commands take an \meta{optional argument},
% a \meta{factor} which is multiplied by the |ex| value for the font in use
% for the metrical symbols; the result is the amount by which the symbol
% is raised (\meta{factor} $> 0$) or lowered (\meta{factor} $< 0$).
% 
% The metrical symbols are separated by a short space, whose size may be set
% with the |\InterSigna| command (see sect. \ref{intersigna}). To generate a
% larger space (typically between feet) use the |\s| \DescribeMacro{\s}
% command; you can modify the size of the space generated by |\s| with the
% |\InterPedes| command (see sect.~\ref{interpedes}). You can also use the
% standard \TeX{} and \LaTeX{} commands  for horizontal spacing.
%
% The |\v| \DescribeMacro{\v} command inserts a comma.
%
% \subsubsection{Placing marks on symbols}
% 
% The |\'| \DescribeMacro{\'} and |\`| commands place an accent (respectively
% acute or grave) over the metrical symbol which follows: |\'\m|\M@yields 
% \metra{\'\m}\,, |\`\m| \DescribeMacro{\`}\M@yields \metra{\`\m}\,.
% Both commands accept an \meta{optional argument}, a \meta{factor} which
% specifies the displacement of the accent to the right, as a fraction of
% the width of the symbol. The default value (.5) places the accent over the
% midpoint of the symbol: |\'[.25]\bb|\M@yields \metra{\'[.25]\bb}, 
% |\'\bb|\M@yields \metra{\'\bb}, |\'[.75]\bb|\M@yields \metra{\'[.75]\bb}.
% For convenience, a set of commands (see page \pageref{accsym}) is provided
% for generating the most common combinations of accents and symbols.
% 
% The |\k| \DescribeMacro{\k} command places the symbol for \textit{catalexis}
% under the symbol which follows: |\k\m|\M@yields \metra{\k\m}\,,
% |\k\bm|\M@yields \metra{\k\bm}\,.  The |\K| \DescribeMacro{\K} command
% generates a slightly larger symbol:  |\K\m|\M@yields \metra{\K\m}\,,
% |\K\bm|\M@yields \metra{\K\bm}\,.
% 
% The |\q| \DescribeMacro{\q} command encloses the argument in some kind of
% \textit{``quotation marks''}; the type of mark used is selected by
% the character that follows the command.
% The |\Q| \DescribeMacro{\Q} command generates slightly larger marks.\par
% \vspace{2ex}
% \tabskip 4em plus 4em minus 2em%
% \halign to \hsize{%
% \hfill#\hfill\tabskip 1em plus 1em&\hfill#\hfill
%   \tabskip 4em plus 4em minus 2em\cr
% \it Type&\it to get\cr
% \noalign{\smallskip}
% |\q(\bbm|&\metra{\q(\bbm}\cr
% |\Q(\bbm|&\metra{\Q(\bbm}\cr
% |\q'\bbm|&\metra{\q'\bbm}\cr
% |\Q'\bbm|&\metra{\Q'\bbm}\cr
% |\q"\bbm|&\metra{\q"\bbm}\cr
% |\Q"\bbm|&\metra{\Q"\bbm}\cr
% |\q!\bbm|&\metra{\q!\bbm}\cr
% |\Q!\bbm|&\metra{\Q!\bbm}\cr
% |\q<\bbm|&\metra{\q<\bbm}\cr
% |\Q<\bbm|&\metra{\Q<\bbm}\cr
% }
% 
% The |\d| \DescribeMacro{\d} command places the symbol for \textit{caesura}
% at the middle point of the symbol which follows: |\d\mbb|\M@yields
% \metra{\d\mbb}\,,  |\d\bbm|\M@yields \metra{\d\bbm}\,.
% 
% The |\S| \DescribeMacro{\S} command has one argument: a sequence of
% characters, which is raised from the baseline by 1.25 times
% the \texttt{ex} value for the font in use for the metrical symbols
% and set in a smaller size: |\C\S{H}|\M@yields \metra{\C\S{H}}. You can
% change the amount by which the argument is raised by specifying an
% \meta{optional argument}. The argument is a \meta{factor} which is
% multiplied by the \texttt{ex} value for the font in use for the metrical
% symbols; the result is added to the default value. |\S[-.3]?\mb| \M@yields
% \metra{\S[-.3]?\mb}, |\bm\S[-.3]?| \M@yields \metra{\bm\S[-.3]?}.
% 
% \subsubsection{Placing annotations on symbols}\label{annot}
% 
% The |\n| \DescribeMacro{\n} command has two arguments: the first is the
% text to be placed over a symbol; the second is the command for the symbol.
% The |\ni| \DescribeMacro{\ni} command places the text \textit{under}
% the symbol. |\n1\m|\M@yields \metra{\n1\m}\,, 
% |\ni1\m|\M@yields \metra{\ni1\m}\,.
%
% The |\N| \DescribeMacro{\N} command has three arguments: the first is
% the text to be placed over a symbol; the second is the command for the
% symbol itself; the third is the text to be placed \textit{under} the symbol.
% The |\mbbx| and |\bbmx| commands are meant to be used in conjunction
% with |\N|: |\N{25}\mbbx{36}|\M@yields \metra{\N{25}\mbbx{36}}\,,
% |\N{25}\bbmx{36}|\M@yields \metra{\N{25}\bbmx{36}}\,.
% 
% In some circumstances (for instance, if the metrical symbol is
% surrounded by taller symbols) it may be necessary to increase the
% spacing between the symbol and the text above or under it.  This can
% be achieved by specifying an \meta{optional argument}, a \meta{factor}
% which is multiplied by the value of the default spacing.  For the |\N|
% command, the new spacing applies to both sides.
% 
% In metrical schemes, |\n| and |\N| can be used to give a reference to
% one or more line numbers within the text. It is advisable to restrict
% such references to one or two numbers. For more than two
% numbers (and whenever the numbers placed over different symbols
% overlap) it is usually better to place a single mark over
% the symbol. The corresponding list of line numbers can be given in a
% separate note, which may be generated with the |\numeri|
% \DescribeMacro{\numeri}command: the argument is a sequence of
% characters that \textit{must} contain a colon: the text preceding the
% colon is set in italics (it is assumed that the same text, also set in
% italics, appears over the symbol).
%
% It is also possible to stack the numbers up vertically by using the
% |\structa| command (see page \pageref{structa}):
%
% |\n{\structa{20}{36}}\mb| \M@yields \metra{\n{\structa{20}{36}}\mb}
% 
% |\n{\structa{31}{\structa{54}{108}}}\mb| \M@yields
% \metra{\n{\structa{31}{\structa{54}{108}}}\mb}
% 
% |\n{\structa[.1]{31;54}{108}}\mb|\ \ yields \kern .5em\relax
% \metra{\n{\structa[.1]{31;54}{108}}\mb}
% \newpage
% \centerline{\Large  METRICAL SYMBOLS}\par
% \label{metsym}
% \vspace {1ex}
% \begin{tabbing}
% mmmmmmm\=mmmmmmmmm\=mmmmmmmmmm\=\kill
% |\m|\>\metra{\m}\>long [\textit{W}]\\
% |\b|\>\metra{\b}\>short [\textit{W}]\\
% |\a|\>\metra{\a}\>anceps [\textit{W}]\\
% |\ma|\>\metra{\ma}\>long syllable in anceps position [\textit{W}]\\
% |\bba|\>\metra{\bba}\>`teilbares Anceps'\\
% |\bm|\>\metra{\bm}\>usually long [\textit{W}]\\
% |\mb|\>\metra{\mb}\>usually short [\textit{W}]\\
% |\bbmb|\>\metra{\bbmb}\>short replaceable by resolvable long\\
% |\bbm|\>\metra{\bbm}\>resolvable long [\textit{W}]\\
% |\bbmx|\>\metra{\bbmx}\>\textsl{see sect.~\ref{annot} %
%   (page \pageref{annot})}\\
% |\bb|\>\metra{\bb}\>resolved long [\textit{W}]\\
% |\bbb|\>\metra{\bbb}\>`teilbares Breve'\\
% |\mbb|\>\metra{\mbb}\>contractible biceps [\textit{W}]\\
% |\mbbx|\>\metra{\mbbx}\>\textsl{see sect.~\ref{annot} %
%   (page \pageref{annot})}\\
% |\pm|\>\metra{\pm}\>\\
% |\ppm|\>\metra{\ppm}\>contracted biceps [\textit{W}]\\
% |\vppm|\>\metra{\vppm}\\
% |\vpppm|\>\metra{\vpppm}\\
% |\tsmb|\>\metra{\tsmb}\>triseme (equivalent to \metra{\m\b}) [\textit{W}]\\
% |\tsbm|\>\metra{\tsbm}\>triseme (equivalent to \metra{\b\m}) [\textit{W}]\\
% |\tsmm|\>\metra{\tsmm}\>tetraseme (equivalent to \metra{\m\m}) [\textit{W}]\\
% |\ps|\>\metra{\ps}\>pentaseme\\
% |\oo|\>\metra{\oo}\>two positions of which one at least
% must be long [\textit{W}]\\
% |\C|\>\metra{\C}\>word-end  [\textit{W}]\\
% |\Ppp|\>\metra{\Ppp}\>often word end [\textit{W}]\\
% |\Pp|\>\metra{\Pp}\>less often word end [\textit{W}]\\
% |\Pxp|\>\metra{\Pxp}\\
% |\Pppp|\>\metra{\Pppp}\>\\
% |\Ppppp|\>\metra{\Ppppp}\>\\
% |\Cc|\>\metra{\Cc}\>period-end (or beginning) [\textit{W}]\\
% |\Ccc|\>\metra{\Ccc}\>strophe-end (or beginning) [\textit{W}]\\
% |\c|\>\metra{\c}\>({\it caesura}) same as \verb/\C/ but with wider spacing\\
% |\cc|\>\metra{\cc}\>same as \verb/\Cc/ but with wider spacing\\
% |\ccc|\>\metra{\ccc}\>same as \verb/\Ccc/ but with wider spacing\\
% |\ppp|\>\metra{\ppp}\>same as \verb/\Ppp/ but with wider spacing\\
% |\pp|\>\metra{\pp}\>same as \verb/\Pp/ but with wider spacing\\
% |\pxp|\>\metra{\pxp}\>same as \verb/\Pxp/ but with wider spacing\\
% |\pppp|\>\metra{\pppp}\>same as \verb/\Pppp/ but with wider spacing\\
% |\ppppp|\>\metra{\ppppp}\>same as \verb/\Ppppp/ but with wider spacing\\
% |\p|\>\metra{\p}\>syncopation \\
% |\r|\ |\R|\>\metra{\r\s\R}\>in responsion with [\textit{W}]\\
% |\t|\ |\T|\>\metra{\t\s\T}\>beginning or end of composition [\textit{W}]\\
% |\x|\>\metra{\x}\>change of speaker [\textit{W}]\\
% \end{tabbing}
% \vspace{8ex}
% \hrule height .6pt
% \vspace{8ex}
% \begin{center}
% {\Large SYMBOLS WITH ACCENT}\par
% \end{center}
% \label{accsym}
% \vspace {1ex}
% \tabskip 4em plus 4em minus 2em%
% \halign to \hsize{%
% #\hfill\tabskip 1em plus 1em&\hfill#\hfill
%   \tabskip 3em plus 3em minus 2em
% &#\hfill\tabskip 1em plus 1em&\hfill#\hfill
%   \tabskip 4em plus 4em minus 2em \cr
% |\M|&\metra{\M}&|\gM|&\metra{\gM}\cr
% |\B|&\metra{\B}&|\gB|&\metra{\gB}\cr
% |\Bm|&\metra{\Bm}&|\gBm|&\metra{\gBm}\cr
% |\Mb|&\metra{\Mb}&|\gMb|&\metra{\gMb}\cr
% |\Mbb|&\metra{\Mbb}&|\gMbb|&\metra{\gMbb}\cr
% |\mBb|&\metra{\mBb}&|\gmBb|&\metra{\gmBb}\cr
% |\mbB|&\metra{\mbB}&|\gmbB|&\metra{\gmbB}\cr
% |\BBm|&\metra{\BBm}&|\gBBm|&\metra{\gBBm}\cr
% |\Bbm|&\metra{\Bbm}&|\gBbm|&\metra{\gBbm}\cr
% |\bBm|&\metra{\bBm}&|\gbBm|&\metra{\gbBm}\cr
% |\BB|&\metra{\BB}&|\gBB|&\metra{\gBB}\cr
% |\Bb|&\metra{\Bb}&|\gBb|&\metra{\gBb}\cr
% |\bB|&\metra{\bB}&|\gbB|&\metra{\gbB}\cr
% }
% \newpage
%
% \subsubsection{Changing the appearance of the symbols}
%
% You can change the appearance of the metrical symbols with these
% commands:
% 
% \begin{list}{}{\leftmargin 0pt}
% 
% \item |\MetraStyle|\DescribeMacro{\MetraStyle}\label{metrastyle}
% changes the style (see sect.~\ref{option}) for the metrical symbols.
% The argument is either |en| (or |En|) for the `English' style or
% |st| for the standard, default style.
%
% \item |\InterSigna| \DescribeMacro{\InterSigna} \label{intersigna} sets
% the size of the space between adjacent metrical symbols. The argument is a 
% \meta{factor} which is multiplied by the width of a \textit{macron}
% (default:~.2).
% 
% \item |\InterPedes| \DescribeMacro{\InterPedes}\label{interpedes} sets
% the size of the space generated by the |\s| command. The argument is a
% \meta{factor} which is multiplied by the width of a \textit{macron}
% (default:~.67).
% 
% \item |\SubSigna| \DescribeMacro{\SubSigna} modifies the distance between
% the horizontal axis of the metrical symbols and the baseline of the
% surrounding text. The parameter is a \meta{factor} which is multiplied
% by the \texttt{ex} value for the font in use immediately before the
% |\metra| command; the result is added to the default displacement
% of the axis from the baseline.
% 
% \item |\Intervallum| \DescribeMacro{\Intervallum} sets the spacing between
% the components of composite symbols such as |\bm| or |\mb|. It may be
% necessary to increase the spacing if the output is to be printed on a
% low-resolution device. The parameter is a \meta{factor} which is multiplied
% by the \texttt{ex} value for the font in use for the metrical symbols
% (default:~.08).
% 
% \item |\Magnitudo| \DescribeMacro{\Magnitudo} modifies the size of the
% metrical symbols. The parameter is a \meta{number}: a positive value
% increases the size, a negative value decreases it. |\Magnitudo{+1}|
% selects the next higher font size in the \LaTeX{} font hierarchy extending
% from |\tiny| to |\Huge|; |\Magnitudo{-1}| the next lower.
% 
% \end{list}
% 
% The effect of these commands, unless they occur inside a \TeX{}
% \textit{group}, applies to the rest of the document from the point of
% use forwards. You can confine the effect to the argument of a single
% |\metra| command by placing the command(s) inside an \meta{optional argument}.
% For convenience, an abbreviated form of the command names is provided 
% for use (only) within the optional argument: |\ms|, |\is|, |\ip|, |\ss|, 
% |\i|, |\m|, with the obvious meaning. |\en| and |\st| may be used as
% shorthand for |\ms{en}| and |\ms{st}|.
%
% \subsection{The environments}
% 
% The two environments, \texttt{metrica} and \texttt{metrike}, allow you
% to place prosodical marks over text set in, respectively, the Latin
% and the Greek alphabet.
% 
% To place a \textit{macron} over a letter, put |\=| \DescribeMacro{\=}
% in front of the letter; to place a \textit{breve}, put |\-| \DescribeMacro{\-}
% in front of the letter (the standard \TeX{} control sequence |\u| may also
% be used). |\begin{metrica} \=a\-e \end{metrica}|\M@yields
% \begin{metrica} \=a\-e \end{metrica}.
%
% To place a \textit{macron} or \textit{breve} over a diphthong, enclose
% the diphthong in braces: |{\metrica \={ae}}|\M@yields{\metrica \={ae}}.
% 
% The environments appear to be compatible with most \LaTeX{}
% environments.  They are \textbf{not} compatible with the \LaTeX{}
% \texttt{tabbing} environment, which redefines some critical
% control sequences.
% 
% By default, the \textit{macron} and \textit{breve}  are placed at the
% natural height for an accent. In some cases, this may make the metrical
% structure difficult to grasp at a glance. The |\Elevatio| 
% \DescribeMacro{\Elevatio} command causes the prosodical marks to be placed
% at a constant distance from the baseline; the command argument is the
% distance, a \meta{factor} of the \texttt{ex} value for the font in use.
% Note that the distance may be negative, in which case the metrical symbol
% is placed \textit{under} the letter. |\Elevatio{0}| restores the default.
%
% The effect of the |\Elevatio| command, unless it occurs inside a \TeX{}
% \textit{group}, applies to the rest of the document from the point of
% use forwards. To modify the vertical spacing for a single instance of
% the environment, give the command inside the environment.
% 
% The |\Translatio| \DescribeMacro{\Translatio} command is analogous to
% |\Elevatio| and controls the horizontal position of the prosodical marks.
% The argument is a \meta{factor} of the \texttt{em} value for the font
% in use; prosodical marks are shifted to the right by this amount.  A value
% around .1 is generally satisfactory for text set in italics.
% \newpage
% Within the environments, the following commands are defined:
%
% |\c|, |\cc|, |\ccc|, |\C|, |\Cc|, |\Ccc|, 
% |\p|, |\pp|, |\ppp|, |\pppp|, |\ppppp|, |\Pp|, |\Ppp|, |\Pppp|, |\Ppppp|,
% |\pxp|, |\Pxp| with the meaning they have within the argument of |\metra|. 
%
% |\pos|, |\Pos|, |\!|, as  abbreviations for |\positio|, |\Positio|, |\dubia|. 
% (see sect.~\ref{diacr})
% \SpecialUsageIndex{\pos}
% \SpecialUsageIndex{\Pos}
% \SpecialUsageIndex{\!}
%
% |\e| and |\t| as  abbreviations for |\Elevatio| and |\Translatio|.
% \SpecialUsageIndex{\e}
% \SpecialUsageIndex{\t}
%
% In case of conflicts, definition of these commands may be suppressed
% by specifying an \meta{optional parameter} for the environment,
% with the value |n| or |N| (e.g. |\begin{metrike}[n]|, 
% |\begin{metrica}[N]|).
%
% \subsubsection{The \texttt{metrica} environment}
% 
% \DescribeEnv{metrica}To place an accent over a letter carrying a
% prosodical mark, put the accent before the letter: |\=`a|\M@yields
% {\metrica\=`a}\,, |\-'a|\M@yields {\metrica\-'a}\,,
% |\='{ae}|\M@yields {\metrica\='{ae}}\,.
% 
% \subsubsection{The \texttt{metrike}  environment}
% 
% \DescribeEnv{metrike} If a letter carries diacritical marks, the letter
% and \textbf{all} its marks (including the character for \textit{iota}
% subscript) must be enclosed in braces to form a single argument for
% |\=| and |\-|.
%
% If either \texttt{ibycus4} or \texttt{Babel} (with the
% \texttt{polutonikogreek} option) is loaded, it is used automatically; if
% both are present, \texttt{ibycus4} is selected.
% If you use another package for Greek fonts, you must issue the
% |\MetrikeFont|\DescribeMacro{\MetrikeFont}\ command before the first
% use of the environment. The  argument of |\MetrikeFont| is the sequence
% of commands that selects the Greek fonts. The command also accepts two
% single-letter symbolic parameters: |i| or |I| to select the
% \texttt{ibycus4} fonts, |b| or |B| to select the \texttt{Babel} fonts.
% 
% The effect of the |\MetrikeFont| command, unless the command occurs inside
% a \TeX{} \textit{group}, applies to the rest of the document from the
% point of use forwards. 
% \newpage
%
% \subsection{The \texttt{\protect\bslash sigla} command}
%
% The command |\sigla| \DescribeMacro{\sigla} generates abbreviations for
% the names of metres (but it may also be used to generate other types of
% abbreviations).  Within the argument of |\sigla| some characters and
% control sequences have a special meaning: 
% \begin{tabbing}
% \hskip 3em{\it T}\={\it ype}\ \ \ \ {\it to }\={\it get}
% \hskip 7em{\it T}\={\it ype}\ \ \ \ {\it to }\={\it get}\\
% \>|l_|\>\sigla{l_}\>|_l|\>\sigla{_l}\\
% \>|l/|\>\sigla{l/}\>|/l|\>\sigla{/l}\\
% \>|l:|\>\sigla{l:}\>|:l|\>\sigla{:l}\\
% \>|l\+|\>\sigla{l\+}\>|\+l|\>\sigla{\+l}\\
% \>|\d|\>\sigla{\d}\ \ {\small(isolated)}
% \>|\D|\>\sigla{\D}\ \ {\small(next to a letter)}\\
% \>|\s|\>\sigla{\s}\\
% \end{tabbing}
% \SpecialUsageIndex{\d}
% The |\charcolon| and |\charslash| commands yield `:' and `/'.
% The |\S| command is available with the meaning it has within the
% argument of |\metra|.
% \SpecialUsageIndex{\charcolon}
% \SpecialUsageIndex{\charslash}
% \SpecialUsageIndex{\S}
%
% The following commands are also defined,
% with the meaning they have within the argument of |\metra|:  
% |\r|, |\x|, |\c|, |\cc|, |\ccc|, |\C|, |\Cc|, |\Ccc|, |\p|, |\pp|,
% |\ppp|, |\pppp|, |\ppppp|, |\Pp|, |\Ppp|, |\Pppp|, |\Ppppp|, |\pxp|,
% |\Pxp|.
% Definition of these commands may be suppressed by specifying an
% \meta{optional parameter} for the |\sigla| command, with the value
% |n| or |N| (e.g. |\sigla[n]|).
%
% For complicated abbreviations, some explicit adjustment of spacing may be
% necessary; this can be achieved by using the characters `|>|' and `|<|'.
% `|>|' inserts a space of approximately $1/18$th of |1em|; `|<|' inserts a
% \textit{negative} space of the same length.
% 
% For example, the following command:\par
% \vskip 1ex
% {\parindent 0pt \parskip 0pt
% |\sigla{gl>\S[.4]{\metra{\bb}}\c \S{\metra{\bb}}<<cr|\par
% |ia_ /3io k>\D{} \d{} D\S3 E>\S2 ph<\S{3d} tl<:|\par
% \vskip 2ex 
% yields: \sigla{gl>\S[.4]{\metra{\bb}}\c\S{\metra{\bb}}<<cr\ \ %
% <<<ia_ /3io%
%  k>\D{} \d{} D\S3 E>\S2 ph<\S{3d} tl<:}
% }
% \vskip 1ex
% By default abbreviations are set in italics. You can change the style
% with the |\FaciesSiglorum |\DescribeMacro{\FaciesSiglorum} command:
% the argument is the sequence of \LaTeX{} or \TeX{} commands to be used
% for setting the text. The effect of the command, unless it occurs inside
% a \TeX{} \textit{group}, applies to the rest of the document from the
% point of use forwards.
%
% \newpage
%
% \section{Other signs}
%
% \subsection{Brackets}
%
% Each command yields the symbol on the right:
% \vspace{1.5ex}
% \tabskip 4em plus 4em minus 2em%
% \halign to \hsize{%
% #\hfill\tabskip 1em plus 1em&\hfill#\hfill
%   \tabskip 4em plus 4em minus 2em
% &#\hfill\tabskip 1em plus 1em
% &\hfill#\hfill
%   \tabskip 4em plus 4em minus 2em 
% &#\hfill\cr
% |\angus|&\angus&|\Angus|&\Angus&\textit{(uncus angulatus)}\cr
% |\angud|&\angud&|\Angud|&\Angud\cr
% |\quadras|&\quadras&|\Quadras|&\Quadras&\textit{(uncus quadratus)}\cr
% |\quadrad|&\quadrad&|\Quadrad|&\Quadrad\cr
% |\alas|&\alas&|\Alas|&\Alas&\textit{(uncus alatus)}\cr
% |\alad|&\alad&|\alad|&\alad\cr
% |\semi[|&\semi[&|\semi]|&\semi]\cr
% |\crux|&\crux&|\Crux|&\Crux\cr
% }
% \SpecialUsageIndex{\angus}
% \SpecialUsageIndex{\Angus}
% \SpecialUsageIndex{\angud}
% \SpecialUsageIndex{\Angud}
% \SpecialUsageIndex{\quadras}
% \SpecialUsageIndex{\Quadras}
% \SpecialUsageIndex{\quadrad}
% \SpecialUsageIndex{\Quadrad}
% \SpecialUsageIndex{\alas}
% \SpecialUsageIndex{\Alas}
% \SpecialUsageIndex{\alad}
% \SpecialUsageIndex{\Alad}
% \SpecialUsageIndex{\semi[}
% \SpecialUsageIndex{\semi]}
% \SpecialUsageIndex{\crux}
% \SpecialUsageIndex{\Crux}
%
% \subsection{Special symbols}
%
% Each command yields the symbol on the right:
% \vspace{1.5ex}
% \tabskip 4em plus 4em minus 2em%
% \halign to \hsize{%
% #\hfill\tabskip 1em plus 1em&\hfill#\hfill
%   \tabskip 4em plus 4em minus 2em
% &#\hfill\tabskip 1em plus 1em&\hfill#\hfill
%   \tabskip 4em plus 4em minus 2em \cr
% |\anaclasis|&\anaclasis&|\Anaclasis|&\Anaclasis\cr
% |\antisigma|&\antisigma&|\Antisigma|&\Antisigma\cr
% |\asteriscus|&\asteriscus&|\Asteriscus|&\Asteriscus\cr
% |\catalexis|&\catalexis&|\Catalexis|&\Catalexis\cr
% |\diple|&\diple&|\Diple|&\Diple\cr
% |\diple*|&\diple*&|\Diple*|&\Diple*\cr
% |\antidiple|&\antidiple&|\Antidiple|&\Antidiple\cr
% |\antidiple*|&\antidiple*&|\Antidiple*|&\Antidiple*\cr
% |\obelus|&\obelus&|\Obelus|&\Obelus\cr
% |\obelus*|&\obelus*&|\Obelus*|&\Obelus*\cr
% |\respondens|&\respondens&|\Respondens|&\Respondens\cr
% |\terminus|&\terminus&|\Terminus|&\Terminus\cr
% |\terminus*|&\terminus*&|\Terminus*|&\Terminus*\cr
% }
% \SpecialUsageIndex{\anaclasis}
% \SpecialUsageIndex{\Anaclasis}
% \SpecialUsageIndex{\antisigma}
% \SpecialUsageIndex{\Antisigma}
% \SpecialUsageIndex{\asteriscus}
% \SpecialUsageIndex{\Asteriscus}
% \SpecialUsageIndex{\catalexis}
% \SpecialUsageIndex{\Catalexis}
% \SpecialUsageIndex{\diple}
% \SpecialUsageIndex{\antidiple}
% \SpecialUsageIndex{\Diple}
% \SpecialUsageIndex{\Antidiple}
% \SpecialUsageIndex{\diple*}
% \SpecialUsageIndex{\antidiple*}
% \SpecialUsageIndex{\Diple*}
% \SpecialUsageIndex{\Antidiple*}
% \SpecialUsageIndex{\obelus}
% \SpecialUsageIndex{\Obelus}
% \SpecialUsageIndex{\obelus*}
% \SpecialUsageIndex{\Obelus*}
% \SpecialUsageIndex{\respondens}
% \SpecialUsageIndex{\Respondens}
% \SpecialUsageIndex{\terminus}
% \SpecialUsageIndex{\Terminus}
% \SpecialUsageIndex{\terminus*}
% \SpecialUsageIndex{\Terminus*}
%
% All the commands for special symbols take an \meta{optional argument},
% a \meta{factor} which is multiplied by the |ex| value for the font in use;
% the result is the amount by which the symbol is raised (\meta{factor} $> 0$)
% or lowered (\meta{factor} $< 0$).
%
% Some of the characters (e.g.~|\diple|, |\obelus|, |\antisigma|) are usually
% placed in front of a line of text, in the left margin. The |\margini|
% command \DescribeMacro{\margini} puts the text given in the argument in
% the left margin of the page; |\margini*| \DescribeMacro{\margini*} puts
% the text in the right margin. The argument is implicitly considered to
% form a \TeX{} \textit{group}, as if it were enclosed by an additional set
% of braces. An \meta{optional argument} can specify a \meta{dimen} which
% is added to the default displacement from the margin of the main text
% (a positive value moves the argument further away from the center of
% the page).
%
% \subsection{Diacritics}\label{diacr}
%
% Each of the following commands places the corresponding mark over the
% letter given as argument:\par\vspace \medskipamount
% {\parskip 0pt
% \DescribeMacro{\macron}%
% \kern 7em \hbox to 9em{|\macron e| \hfill \macron e}\par
% \DescribeMacro{\breve}%
% \kern 7em \hbox to 9em{|\breve e| \hfill \breve e}\par
% \DescribeMacro{\acutus}%
% \kern 7em \hbox to 9em{|\acutus e| \hfill \acutus e}\par
% \DescribeMacro{\gravis}%
% \kern 7em \hbox to 9em{|\gravis e| \hfill \gravis e}\par
% \DescribeMacro{\circumflexus}%
% \kern 7em \hbox to 9em{|\circumflexus e| \hfill \circumflexus e}\par
% \DescribeMacro{\diaeresis}%
% \kern 7em \hbox to 9em{|\diaeresis e| \hfill \diaeresis e}\par
% }
% The commands take an \meta{optional argument}, a \meta{factor} which
% is multiplied by the |ex| value for the font in use; the result is the
% amount by which the mark is raised (\meta{factor} $> 0$) or lowered
% (\meta{factor} $< 0$).
% \textit{\large Note}: the \TeX{} mathematical accent normally associated
% with |\breve| may be generated with the command |\Breve|. 
%
% The |\cons| \DescribeMacro{\cons} command places a semicircle under the
% letter that follows, to indicate \textit{consonantization} of a vowel:
% |\cons{u}|\M@yields \cons{u}\,.
%
% The argument of the |\dubia| \DescribeMacro{\dubia} command is a letter,
% under which the command places a small dot to show that the letter is
% only partially preserved in a manuscript or epigraphical text.
% If the letter carries diacritical marks, these must all be included in
% the argument.
%
% The |\dubiae| \DescribeMacro{\dubiae} command has one parameter, a string
% of letters, and places a small dot under each of the letters. If a letter
% within the string carries diacritical marks, it must be enclosed, together
% with all the marks, within braces.
%
% The \texttt{*}-forms \DescribeMacro{\dubia*} are meant to be used in
% conjunction  with fonts, like those of |ibycus4|, \DescribeMacro{\dubiae*}
% that have ligatures for all combinations of a letter and the dot.  The
% use of ligatures allows a more precise positioning of the dot, taking the
% shape of the letter into account.   
% 
% The |\erasa| command \DescribeMacro{\erasa} \M@yields \erasa.
%
% The |\positio| \DescribeMacro{\positio} command yields the symbol \positio\,,
% which is used between a mute and a liquid to show that the combination
% \textit{makes position\/}, i.e.~closes and thereby lengthens the preceding
% syllable. |\Positio| \DescribeMacro{\Positio} generates a slightly
% larger symbol \Positio\,.
%
% The |\punctum| \DescribeMacro{\punctum} command places a small dot under
% a space, to show that a letter is missing.
% |\Punctum| \DescribeMacro{\Punctum} yields a dot enclosed within parentheses.
% Both commands take an \meta{optional argument}, a \meta{number} that is
% interpreted as a repetition count.
% \textit{\large Caution}: sometimes the dot is immediately followed,
% in the text, by a left square bracket; if you write |\punctum[|\ \,\TeX{}
% will interpret the bracket as the start of the optional
% argument and give an error message.  Use either |\punctum{}[|
% or |\punctum\lbrack|.
%
% \subsection{Ties}\label{tie}
%
% The commands described in this section allow you to place \textit{tie}
% symbols above a sequence of up to three adjacent characters or under it.
% All combinations are allowed, including some that are not particularly
% sensible or useful. 
% 
% |\tie| \DescribeMacro{\tie} places $\frown$ above the characters.
%
% |\itie| \DescribeMacro{\itie} places $\smile$ below the characters.
%
% |\tie*| \DescribeMacro{\tie*} places $\frown$ below the characters.
%
% |\itie*| \DescribeMacro{\itie*} places $\smile$ above the characters.
% 
% The size of the symbol is chosen so that it embraces all the text. In
% some cases, you may wish to use a smaller or larger size. An
% \meta{optional argument} can specify a \meta{factor} which 
% is multiplied by the width of the text: the size of the symbol is then
% chosen as if the text had that width. Keep in mind, however, that only
% a limited range of symbol sizes is available in the Computer Modern fonts.
% 
% When any of the \textit{tie} commands is used within the argument
% of |\metra|, a \meta{factor} of .6 is applied automatically and 
% an explicit \meta{factor}, if specified, applies to the width
% as modified by the automatic factor. While |\tie{a e}|\M@yields
% \tie{a e}, |\metra{\tie{\m\s\m}}|\M@yields \metra{\tie{\m\s\m}} 
% 
% Examples:\par
% \begin{tabbing}
% \hskip 2.5em\=xtie{abc}\hskip 5em\=abc%
% \hskip 4em\=xtie{abc}\hskip 5em\=abc\kill
% \>|\tie{ae}|\>\tie{ae}\>|\itie{ae}|\>\itie{ae}\\
% \>|\tie{uae}|\>\tie{uae}\>|\itie{uae}|\>\itie{uae}\\
% \>|\tie{a e}|\>\tie{a e}\>|\itie{a e}|\>\itie{a e}\\
% \>|a\tie{ }e|\>a\tie{ }e\>|a\itie{ }e|\>a\itie{ }e\\
% \>|\tie[.6]{a e}|\>\tie[.6]{a e}\>|\itie[.6]{a e}|\>\itie[.6]{a e}\\
% \>|\tie[.8]{a e}|\>\tie[.8]{a e}\>|\itie[.8]{a e}|\>\itie[.8]{a e}\\
% \end{tabbing}
% \begin{verse}
% |Oceanum\itie{ }interea surgens Aurora reliquit.|\\
% |It portis iubar\itie[.6]{e e}xorto delecta iuventus.|\par
% Oceanum\itie{ }interea surgens Aurora reliquit.\\
% It portis iubar\itie[.6]{e e}xorto delecta iuventus.\par
%  \end{verse}
%
% \subsection{Interlinear signs}
%
% The signs generated by the commands described in this section are those
% commonly used for marking strophic divisions in Greek lyrical poetry. 
% The symbols are inserted between lines or placed at the end of the text.
%
% The commands must be used inside a \LaTeX{} environment (such as |verse|)
% in which each line is terminated by |\\|, or else within the scope of
% the \TeX{} |\obeylines| command.  The normal form of the commands is
% used within \LaTeX{} environments, while the \texttt{*}-form
% must be used within the scope of |\obeylines|.
%
% The commands must appear at the end of a line and, if used within a \LaTeX{}
% environment, must \textit{not} be followed by |\\|.  The symbol is inserted
% after the line on which the command occurs and the distance between this line
% and the line that follows (which may be empty for symbols that are 
% placed after the last line of the text) is increased by 15\%.
%
% The automatic increment of the interline spacing may be modified by an
% \meta{optional argument}, a \meta{factor} which is multiplied by the
% current value of |\baselineskip|; the result is added to the default
% increment.
%
% The basic command is |\linea| \DescribeMacro{\linea} which generates
% a short line \,\imago*{\linea}\, extending to the left of the
% margin of the surrounding text by half its length.
% There are two variants of |\linea|, both available in two sizes:\par
% \noindent\kern 1em\imago*{\bifida}\kern 2em |\lineabifida| or 
% |\bifida| \DescribeMacro{\bifida}\par
% \SpecialUsageIndex{\lineabifida}
% \noindent\kern 1em\imago*{\Bifida}\kern 2em  |\Lineabifida| or 
% |\Bifida| \DescribeMacro{\Bifida}\par
% \SpecialUsageIndex{\Lineabifida}
% \noindent\kern 1em\imago*{\lunata}\kern 2em |\linealunata| or 
% |\lunata| \DescribeMacro{\lunata}\par
% \SpecialUsageIndex{\linealunata}
% \noindent\kern 1em\imago*{\Lunata}\kern 2em |\Linealunata| or 
% |\Lunata| \DescribeMacro{\Lunata}
% \SpecialUsageIndex{\Linealunata}
%
% The |\geminata| \DescribeMacro{\geminata} command yields a pair of lines,
% each identical to the line generated by |\linea|:\ \imago[-.3]{\geminata}\,.
%
%
% You can place some text (for instance, parentheses or a question mark)
% on either side of the symbols generated by the commands listed above
% by means of the |\antelineam|\DescribeMacro{\antelineam}\ and |\postlineam|
% commands.  The commands must appear \DescribeMacro{\postlineam} at the
% beginning of the line which follows the symbol.  Each command takes one
% argument: the text to be placed before or after the symbol. 
% The text is implicitly considered to form a \TeX{} \textit{group}, as if it
% were enclosed by an additional set of braces. Within the argument, any command
% selecting the font to be used for the text must \textit{not} appear within
% a \textit{group}; if, for  instance, you wish to use parentheses taken from
% the smallest font available to \LaTeX{}  you should write:
% |\antelineam{\tiny(}| and |\postlineam{\tiny)}| and \textbf{not}
% |\antelineam{{\tiny(}}| or |\postlineam{{\tiny)}}|.
%
% The |\coronis| \DescribeMacro{\coronis} command generates a stylized
% representation of the symbol sometimes found in manuscripts. 
% Because of its peculiar shape, the symbol \margini{\imago*{\coronis}} 
% is not placed between lines but to the left of the text.
%
% \subsubsection*{Generating the signs within the text}
%
% To generate one of the signs described in this section within ordinary
% text, use the |\imago| \DescribeMacro{\imago} command. The argument is
% the name of the command yielding the sign:  |\imago{\bifida}|
% \M@yields\imago{\bifida}.
% The sign is generated at its natural distance from the baseline.
% The distance may be modified by an \meta{optional argument}; the argument,
% a \meta{factor}, is multiplied by the current value of
% |\baselineskip| and the result is added to the default distance.
% |\imago[-.6]{\bifida}|\M@yields\imago[-.6]{\bifida}. 
%
% The \texttt{*}-form of the command \DescribeMacro{\imago*} automatically
% aligns the sign with the surrounding text: |\imago*{\bifida}|%
% \M@yields \imago*{\bifida}.
%
% \subsubsection*{Defining new signs}
%
% The |\novalinea| \DescribeMacro{\novalinea} command defines
% a new command that yields a line placed at the same height as the line
% generated by |\linea| but having a different length and/or indentation
% from the text margin.  The command has four parameters:
% \begin{list}{}{\parsep 0pt\itemsep 0pt\labelsep 1.5em \topsep 0pt}
% \item[\textit{1}] the name of the new command;
% \item[\textit{2}] the indentation, relative to the left margin of the
% text, of the line;
% \item[\textit{3}] the length of the line;
% \item[\textit{4}] the amount by which the interline spacing should be
% increased, given as a \meta{factor} that is to be multiplied by the value of
% |\baselineskip|. 
% \end{list}{}{}
% For instance, the command |\novalinea{\Linea}{-.5em}{2em}{.2}| defines
% |\Linea| as a command that yields a line of length \texttt{2em}, indented
% to the left of the text margin by $1/4$ of its length; the interline
% spacing is increased by 20\%.
%
% The |\novageminata| \DescribeMacro{\novageminata} command, with the
% same parameters as |\novalinea|, defines a new command that yields
% a pair of lines similar to those generated by |\geminata|. 
%
% Definitions made with these two commands are valid within the
% \TeX{} \textit{group} within which they occur.  It is  therefore possible
% to restrict their effect to a section of the  document by enclosing the
% section within braces and placing the definitions after the opening brace.
%
% Note that it is possible to change the definition of |\linea| by
% saying |\novalinea{\linea}|\texttt{\ldots}\ Changing the definition
% of |\linea| automatically changes the appearance of |\geminata|,
% |\bifida|, |\Bifida|, |\lunata| and |\Lunata|.
%
% If you prefer a typographical style that puts the interlinear signs
% into the margin, away from the text, you need only change the definition
% of |\linea| (setting the appropriate value for indentation) in the preamble
% and all the document will be typeset in this style.
%
% \subsection{\textit{Miscellanea}}
%
% The |\lineola| \DescribeMacro{\lineola} command generates, at the point
% where it is used, a horizontal line having the length given in the 
% command argument.  The line is placed at the same height, relative to
% the baseline of the text, as the line generated by |\linea|. You can
% change the height by specifying an \meta{optional argument}: a \meta{factor}
% which is multiplied by the value of |\baselineskip|; the result
% is added to the default displacement from the baseline.
%
% The |\Lineola| \DescribeMacro{\Lineola} command generates a horizontal
% line over the text given in the command argument.  The command accepts an
% \meta{optional argument}, with the same meaning as the corresponding
% argument of |\lineola|. |\Lineola[-.25]{mrs}| \M@yields \Lineola[-.25]{mrs}.
% \newpage
% The |\structa| \DescribeMacro{\structa} command \label{structa} takes two
% arguments and places the text given in the second argument over the text
% given in the first argument. Both arguments are implicitly considered
% to form \TeX{} \textit{groups}, as if each argument were enclosed by
% an additional set of braces.
% The command takes an \meta{optional argument}, a \meta{factor} which is
% multiplied by the |ex| value for the font in use; the result is
% the amount by which the text in the second argument is raised
% (\meta{factor} $> 0$) or lowered (\meta{factor} $< 0$).
% |w\structa{xy}{\tiny ab}z| \M@yields w\structa{xy}{\tiny ab}z.
%
% \vspace{5ex} 
% \begingroup
% \Large
% Happy
% \begin{metrica}
% T\kern -.1667em \lower .5ex \hbox{\-E}\kern-.125em Xing\,!%
% \end{metrica}
% \endgroup
% \newpage
% \PrintIndex
% \StopEventually{}
% \parindent 0pt
% \newpage
% \setlength{\parskip}{.3ex}
%
% \section{The package code} \label{sec:code}
%
% \subsection{Preliminaries} 
%
%    \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}[1999/12/01]
\ProvidesPackage{metre}%
  [2001/12/05 v. 1.0 A package for classicists]
%    \end{macrocode}
%
% Set the style for |\metra|:
%    \begin{macrocode}
\DeclareOption{st}{\def\M@opt@style{0}}
\DeclareOption{en}{\def\M@opt@style{1}}
\DeclareOption{En}{\def\M@opt@style{2}}
\ExecuteOptions{st}
\ProcessOptions
%    \end{macrocode}
%
%    \begin{macrocode}
\RequirePackage{relsize}
%    \end{macrocode}
%
% Suppress all |relsize| warnings which would needlessly
% alarm the user. 
%
%    \begin{macrocode}
\renewcommand{\rs@size@warning}[2]{\relax}
%    \end{macrocode}
%
% \subsection{Variables} 
%
% Set to 1 if |ibycus| is loaded.
%    \begin{macrocode}
\newcount\M@ibycus
%    \end{macrocode}
%
% Set to 1 while we are within the parameter of |\metra|.
%    \begin{macrocode}
\newcount\M@metra
%    \end{macrocode}
%
% The font number (as defined by |relsize|) for the font used in |\metra|.
%
%    \begin{macrocode}
\newcount\M@metra@font
%    \end{macrocode}
%
% |True| if we must generate a grave accent.
%
%    \begin{macrocode}
\newif\ifM@gravis
%    \end{macrocode}
%
% |True| if we must generate the \textit{inter signa} space.
%
%    \begin{macrocode}
\newif\ifM@inter
%    \end{macrocode}
%
% |True| if the symbol just generated is some sort of vertical bar.
%
%    \begin{macrocode}
\newif\ifM@vert@bar
%    \end{macrocode}
%
% |True| if we must generate a stand-alone interlinear sign.
%
%    \begin{macrocode}
\newif\ifM@imago
%    \end{macrocode}
%
% |True| if we just want to set the |\dimen| registers for |\linea|.
%
%    \begin{macrocode}
\newif\ifM@linea@dimen
%    \end{macrocode}
%
% |True| if we have the *-form of a command.
%
%    \begin{macrocode}
\newif\ifM@starred
%    \end{macrocode}
%
% |True| if we must generate a character at a larger size.
%
%    \begin{macrocode}
\newif\ifM@big
%    \end{macrocode}
%
% Boxes for the basic symbols:
%
%    \begin{macrocode}
\newbox\M@box@m%        macron 
\newbox\M@box@b%        breve 
\newbox\M@box@tsmb%     triseme (macron + breve)
\newbox\M@box@tsbm%     triseme (breve + macron)
\newbox\M@box@tsmm%     tetraseme (macron + macron)
\newbox\M@box@ps%       pentaseme (macron + macron)
\newbox\M@box@a%        anceps 
\newbox\M@box@o%        one half of `eolic base'
\newbox\M@box@k%        catalexis 
\newbox\M@box@K%        catalexis (large)
\newbox\M@box@p%        dot 
\newbox\M@box@A%        acute accent
\newbox\M@box@G%        grave accent
%    \end{macrocode}
%
% Registers for some important dimensions:
%
%    \begin{macrocode}
\newdimen\M@dim@m%      width of macron box 
\newdimen\M@dim@b%      width of breve box
\newdimen\M@dim@p%      width of dot box
\newdimen\M@dim@s%      size of space
%    \end{macrocode}
%
% The amount by which the breve is lowered in the |[en]| style.
%
%    \begin{macrocode}
\newdimen\M@dim@bsink
%    \end{macrocode}
%
% The amount by which a symbol has actually sunk.
%
%    \begin{macrocode}
\newdimen\M@dim@sunk
%    \end{macrocode}
%
% |ex| value for the font being used for the metrical symbols.
%
%    \begin{macrocode}
\newdimen\M@metra@ex   
%    \end{macrocode}
%
% |ex| value for the font in use before |\metra|.
%
%    \begin{macrocode}
\newdimen\M@text@ex
%    \end{macrocode}
%
% Space before and after a \textit{caesura}. 
%
%    \begin{macrocode}
\newdimen\M@dim@c@ext
%    \end{macrocode}
%
% Space inside a double or triple \textit{caesura}.
%
%    \begin{macrocode}
\newdimen\M@dim@c@int
%    \end{macrocode}
%
% Space before and after a \textit{caesura}. 
%
%    \begin{macrocode}
\newdimen\M@dim@c@Ext
%    \end{macrocode}
%
% Indentation, height and length of |\linea|. 
%
%    \begin{macrocode}
\newdimen\M@linea@indent
\newdimen\M@linea@height
\newdimen\M@linea@length
%    \end{macrocode}
%
% \subsection{Inizialization} 
%
%    \begin{macrocode}
\AtBeginDocument{%
  \@ifpackageloaded{ibycus4}{\M@ibycus\@ne}{\M@ibycus\z@}%
  \let\M@prevsize=\relax
  \def\M@before@linea{\relax}%
%    \end{macrocode}
%
% The metrical symbols are taken from the font at |\relsize{+2}|:
%
%    \begin{macrocode}
  \let\M@step@up=\tw@
}
%    \end{macrocode}
%
% \subsection{Global commands} 
%
%    \begin{macrocode}
\newcommand{\InterSigna}[1]{\def\M@interS{#1}}
\newcommand{\InterPedes}[1]{\def\M@interP{#1}}
\newcommand{\SubSigna}[1]{\def\M@subS{#1}}
\newcommand{\Magnitudo}[1]{\def\M@magnitudo{#1}}
\newcommand{\Elevatio}[1]{\def\M@elevatio{#1}}
\newcommand{\Translatio}[1]{\def\M@translatio{#1}}
\newcommand{\Intervallum}[1]{\def\M@intervallum{#1}}
\newcommand{\FaciesSiglorum}[1]{\def\M@facies{#1}}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\MetraStyle}[1]{\M@MetraStyle#1}
\def\M@MetraStyle#1#2{%
  \let\M@opt=\relax
  \ifx e#1\relax
    \ifx n#2\relax
      \let\M@opt=1\relax 
    \fi
  \fi
  \ifx E#1\relax
    \ifx n#2\relax
      \let\M@opt=2\relax   
    \fi
  \fi
  \ifx s#1\relax 
    \ifx t#2\relax
      \let\M@opt=0\relax  
    \fi
  \fi
  \ifx \M@opt\relax
    \PackageError{metre}%
        {Illegal option for \protect\MetraStyle}%
        {Valid options are `en', `En', `st'.}%
  \else
    \edef\M@opt@style{\M@opt}%
  \fi
}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\MetrikeFont}[1]{\def\M@MetrikeFont{#1}}
%    \end{macrocode}
%
% Set the default values. 
%
%    \begin{macrocode}
\InterSigna{.2}%
\InterPedes{.67}%
\SubSigna{0}%
\Magnitudo{0}%
\Elevatio{0}%
\Translatio{0}%
\Intervallum{.08}%
\FaciesSiglorum{\it}%
%    \end{macrocode}
%
% \subsection{The \texttt{\protect\bslash metra} command} 
%
%    \begin{macrocode}
\newcommand{\metra}[2][\relax]{%
%    \end{macrocode}
%
% Check for a recursive call and set a flag to show
% we are within |\metra|.
%
%    \begin{macrocode}
  \ifnum \M@metra=\@ne
    \PackageError{metre}{Recursive use of \protect\metra}%
      {You cannot use \protect\metra within%
       the argument \MessageBreak
       of another \protect\metra command}%
  \fi
  \M@metra=\@ne
%    \end{macrocode}
%
% Save the information about the current font size and make sure we are
% in horizontal mode.
%
%    \begin{macrocode}
  \let\M@text@fontsize=\@currsize
  \M@text@ex=\fontdimen5\the\font
  \leavevmode
%    \end{macrocode}
% \newpage
% Start a group so that all command definitions stay local.
%
%    \begin{macrocode}
  \begingroup
%    \end{macrocode}
% Initial setup, including execution of commands in the optional argument.
%    \begin{macrocode}
  \M@metra@setup{#1}%
%    \end{macrocode}
% 
% The text is set as a single |\hbox| so that it can be moved
% up and down as necessary.  This also has the advantage of
% preventing the metrical scheme from being split across lines.
% 
%    \begin{macrocode}
  \dimen0=\if 0\M@opt@style 0\else .5\fi \M@text@ex
  \advance \dimen0 by \M@subS \M@text@ex
  \raise \dimen0 \hbox{\hss\M@interfalse #2\hss}%
  \endgroup
  \M@metra=\z@
  \relax
}
%    \end{macrocode}
%
% \subsubsection{\texttt{\protect\bslash metra} set up} 
%
%    \begin{macrocode}
\def\M@metra@setup#1{%
%    \end{macrocode}
%
% Execute the commands (if any) in the optional argument.
%
%    \begin{macrocode}
  \let\is=\InterSigna
  \let\i=\Intervallum
  \let\ip=\InterPedes
  \let\ss=\SubSigna
  \let\m=\Magnitudo
  \let\ms=\MetraStyle
  \def\en{\MetraStyle{en}}%
  \def\En{\MetraStyle{En}}%
  \def\st{\MetraStyle{st}}%
  #1\relax
%    \end{macrocode}
%
% Switch to the CMR font that will be used for all symbols.
%
%    \begin{macrocode}
  \M@cmr
%    \end{macrocode}
% 
% Select the font size.
% 
%    \begin{macrocode}
  \count255=\M@magnitudo
  \advance \count255 by \M@step@up
  \relsize{\count255}%
  \let\M@metra@fontsize=\@currsize
  \M@metra@ex=1ex
%    \end{macrocode}
%
% Avoid rebuilding the boxes if the font size has not changed from
% the previous use of |\metra|.
%
%    \begin{macrocode}
  \ifx \@currsize \M@prevsize
    \relax
  \else
    \M@makeboxes
    \global\let\M@prevsize=\@currsize
  \fi
%    \end{macrocode}
%
% Set a few dimensional registers that may be affected by commands 
% in the optional argument.
%
%    \begin{macrocode}
  \M@dim@c@ext=\M@interP\M@dim@m
  \M@dim@c@int=\M@interS\M@dim@m
  \M@dim@c@ext=1.33\M@dim@c@ext
  \M@dim@c@Ext=\M@dim@c@int
  \M@dim@s=\M@interP\M@dim@m
%    \end{macrocode}
%
% Now make all the macros available:
%
%    \begin{macrocode}
  \let\a    \M@a
  \let\b    \M@b    \let\B    \M@B
                    \let\gB   \M@gB
  \let\bb   \M@bb   \let\BB   \M@BB  
                    \let\gBB  \M@gBB 
                    \let\Bb   \M@Bb  
                    \let\gBb  \M@gBb 
                    \let\bB   \M@bB
                    \let\gbB  \M@gbB
  \let\bm   \M@bm   \let\Bm   \M@Bm 
                    \let\gBm   \M@gBm
  \let\bba  \M@bba
  \let\bbb  \M@bbb
  \let\bbm  \M@bbm  \let\BBm  \M@BBm  
                    \let\gBBm \M@gBBm 
                    \let\Bbm  \M@Bbm   
                    \let\gBbm \M@gBbm  
                    \let\bBm  \M@bBm
                    \let\gbBm \M@gbBm
  \let\bbmx \M@bbmx
  \let\bbmb \M@bbmb
  \let\m    \M@m    \let\M    \M@M   
                    \let\gM   \M@gM
  \let\ma   \M@ma
  \let\mb   \M@mb   \let\Mb   \M@Mb
                    \let\gMb  \M@gMb
  \let\mbb  \M@mbb  \let\Mbb  \M@Mbb     
                    \let\gMbb \M@gMbb    
                    \let\mBb  \M@mBb   
                    \let\gmBb \M@gmBb  
                    \let\mbB  \M@mbB
                    \let\gmbB \M@gmbB
  \let\mbbx \M@mbbx 
  \let\c    \M@c    \let\cc   \M@cc    \let\ccc   \M@ccc
  \let\C    \M@C    \let\Cc   \M@Cc    \let\Ccc   \M@Ccc
  \let\d    \M@d
  \let\k    \M@k    \let\K    \M@K
  \let\n    \M@n    \let\ni   \M@ni    \let\N     \M@N   
  \let\o    \M@o    \let\oo   \M@oo  
  \let\p    \M@p    \let\pp   \M@pp    \let\Pp    \M@Pp 
                    \let\pxp  \M@pxp   \let\Pxp   \M@Pxp
  \let\pm   \M@pm   \let\ppm  \M@ppm   \let\pppm  \M@pppm  
                    \let\vppm \M@vppm  \let\vpppm \M@vpppm
  \let\ppp  \M@ppp  \let\pppp \M@pppp  \let\ppppp \M@ppppp 
  \let\Ppp  \M@Ppp  \let\Pppp \M@Pppp  \let\Ppppp \M@Ppppp 
  \let\q    \M@q    \let\Q    \M@Q
  \let\r    \M@r    \let\R    \M@R 
  \let\s    \M@s  
  \let\S    \M@super@metra
  \let\t    \M@t    \let\T    \M@T
  \let\tsbm \M@tsbm 
  \let\tsmb \M@tsmb  
  \let\tsmm \M@tsmm  
  \let\ps   \M@ps
  \let\v    \M@v    
  \let\x    \M@x   
  \let\'\M@acutus   \let\`\M@gravis
}
%    \end{macrocode}
%
% \subsubsection{Manufacturing the basic boxes} 
%
% \textit{``The horror! The horror!''}. Here is the package's heart of darkness.
% For each basic metrical symbol we build a box that encloses, as 
% precisely as possible, the `inked' part of the character box.
% A few of the magic numbers that are sprinkled throughout this truly messy
% code have been derived from the Metafont source but most have been arrived
% at \textit{provando e riprovando}.  A cleaner solution would have
% been to extract the information from the GF files with a program;
% but writing the program would have been hardly less boring and would
% have taken up much more time.
%
%    \begin{macrocode}
\def\M@makeboxes{%
  \M@metra@font=%
  \ifx \@currsize \Large 6 \else
  \ifx \@currsize \large 5 \else
  \ifx \@currsize \normalsize 4 \else
  \ifx \@currsize \small 3 \else
  \ifx \@currsize \footnotesize 2 \else
  \ifx \@currsize \scriptsize 1 \else
  \ifx \@currsize \LARGE 7 \else
  \ifx \@currsize \huge 8 \else
  \ifx \@currsize \Huge 9 \else
  \ifx \@currsize \tiny 0 
  \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
%    \end{macrocode}
%
% Macron and breve
%
%    \begin{macrocode}
  \setbox0=\hbox{\char22}%
  \global\M@dim@m=.73\wd0 
  \global\M@dim@b=.59\wd0 
  \ifnum 2>\M@metra@font \global\M@dim@b=.58\wd0 
  \else
    \ifnum 4=\M@metra@font \global\M@dim@b=.575\wd0 
    \else
      \ifnum 5=\M@metra@font \global\M@dim@b=.575\wd0 
      \else
        \ifnum 6=\M@metra@font \global\M@dim@b=.5775\wd0 
        \else
          \ifnum 7=\M@metra@font \global\M@dim@b=.595\wd0 
          \fi
        \fi
      \fi
    \fi
   \fi
  \global\M@dim@p=.25\wd0 
  \global\setbox\M@box@m=\hbox to \M@dim@m{%
    \hss
    \dimen0=1.235\M@metra@ex
    \ifcase \@ptsize
      \ifnum 1=\M@metra@font \dimen0=1.2\M@metra@ex
      \else
        \ifnum 9=\M@metra@font \dimen0=1.25\M@metra@ex
        \fi
      \fi
    \or
      \ifnum 0=\M@metra@font \dimen0=1.25\M@metra@ex
      \else
        \ifnum 9=\M@metra@font \dimen0=1.25\M@metra@ex
        \fi
      \fi
    \or
      \ifnum 0=\M@metra@font \dimen0=1.25\M@metra@ex
      \else
        \ifnum 7<\M@metra@font \dimen0=1.25\M@metra@ex
        \fi
      \fi
    \fi
    \lower\dimen0\hbox{\char22}%
    \hss
  }%
  \dimen0=.089\M@metra@ex
  \ifcase \@ptsize
    \ifnum 4>\M@metra@font
      \dimen0=.08\M@metra@ex
    \else
      \ifnum 6<\M@metra@font
        \dimen0=.05\M@metra@ex
      \fi
    \fi
  \or
     \dimen0=.08\M@metra@ex
  \or
     \dimen0=.08\M@metra@ex
  \fi
  \global\ht\M@box@m=\dimen0 
  \global\dp\M@box@m=\z@
%    \end{macrocode}
%
%    \begin{macrocode}
  \global\setbox\M@box@b=\hbox to \M@dim@b{%
    \hss
    \lower 1.142\M@metra@ex\hbox{\char21}%
    \hss}%
  \global\ht\M@box@b=.495\M@metra@ex
  \global\dp\M@box@b=\z@
  \global\M@dim@bsink=.4\ht\M@box@b
%    \end{macrocode}
%
% Dot
%
%    \begin{macrocode}
  \global\setbox\M@box@p=\hbox to \M@dim@p{%
    \hss
    \lower 1.3\M@metra@ex\hbox{\char95}%
    \hss}%
  \global\ht\M@box@p=.15\M@metra@ex
  \global\dp\M@box@p=\z@
%    \end{macrocode}
%
%  Triseme (equivalent to \metra{\m\b})
%
%    \begin{macrocode}
  \global\setbox\M@box@tsmb=\hbox{%
    \vrule height .4\M@metra@ex width \ht\M@box@m
    \hbox to 1.667\M@dim@m{%
      \leaders\hrule height \ht\M@box@m\hfill}}%
  \dimen0=1.667\M@dim@m
  \advance \dimen0 by \ht\M@box@m
  \global\wd\M@box@tsmb=\dimen0 
  \global\ht\M@box@tsmb=.2\M@metra@ex
  \global\dp\M@box@tsmb=\z@
%    \end{macrocode}
%
% Triseme (equivalent to \metra{\b\m})
%
%    \begin{macrocode}
  \global\setbox\M@box@tsbm=\hbox{%
    \hbox to 1.667\M@dim@m{%
      \leaders\hrule height \ht\M@box@m\hfill}%
    \vrule height .4\M@metra@ex width \ht\M@box@m}%
  \dimen0=1.667\M@dim@m
  \advance \dimen0 by \ht\M@box@m
  \global\wd\M@box@tsbm=\dimen0 
  \global\ht\M@box@tsbm=.2\M@metra@ex
  \global\dp\M@box@tsbm=\z@
%    \end{macrocode}
%
%  Tetraseme
%
%    \begin{macrocode}
  \global\setbox\M@box@tsmm=\hbox{%
     \vrule height .4\M@metra@ex width \ht\M@box@m%
     \hbox to 1.667\M@dim@m{%
       \leaders\hrule height \ht\M@box@m\hfill}%
     \vrule height .4\M@metra@ex width \ht\M@box@m%
       \kern \ht\M@box@m}%
  \dimen0=1.667\M@dim@m
  \advance \dimen0 by 2\ht\M@box@m
  \global\wd\M@box@tsmm=\dimen0 
  \global\ht\M@box@tsmm=.2\M@metra@ex
  \global\dp\M@box@tsmm=\z@
%    \end{macrocode}
%
%  Pentaseme
%
%    \begin{macrocode}
  \global\setbox\M@box@ps=\hbox{%
     \vrule height .4\M@metra@ex width \ht\M@box@m%
     \hbox to .82\M@dim@m{%
       \leaders\hrule height \ht\M@box@m\hfill}%
     \vrule height .4\M@metra@ex width \ht\M@box@m%
     \hbox to .825\M@dim@m{%
       \leaders\hrule height \ht\M@box@m\hfill}%
     \vrule height .4\M@metra@ex width \ht\M@box@m%
       \kern \ht\M@box@m}%
  \dimen0=1.667\M@dim@m
  \advance \dimen0 by 3\ht\M@box@m
  \global\wd\M@box@ps=\dimen0 
  \global\ht\M@box@ps=.2\M@metra@ex
  \global\dp\M@box@ps=\z@
%    \end{macrocode}
% 
% Acute accent
%
%    \begin{macrocode}
  \global\setbox\M@box@A=\hbox{%
    \hss
    \lower 1.1\M@metra@ex\hbox{\char19}%
    \hss}%
  \global\ht\M@box@A=.175\M@metra@ex
  \global\dp\M@box@A=\z@
%    \end{macrocode}
%
% Grave accent
%
%    \begin{macrocode}
  \global\setbox\M@box@G=\hbox{%
    \hss
    \lower 1.1\M@metra@ex\hbox{\char18}%
    \hss}%
  \global\ht\M@box@G=.2\M@metra@ex
  \global\dp\M@box@G=\z@
%    \end{macrocode}
%
% The symbols that follow are all taken from the math font.
%
%    \begin{macrocode}
  \begingroup
%    \end{macrocode}
% 
% Catalexis (large)
% 
%    \begin{macrocode}
  \begingroup$\textstyle
    \global\setbox\M@box@K=\hbox{%
      \lower 1.25ex \hbox{\hss\symbol{"5E}\hss}}%
  $\endgroup
%    \end{macrocode}
% 
%    \begin{macrocode}
  \relsize{-3}%
%    \end{macrocode}
% 
% Catalexis (small)
% 
%    \begin{macrocode}
  \begingroup$\scriptscriptstyle
    \global\setbox\M@box@k=\hbox{%
      \lower 1.25ex \hbox{\hss\symbol{"5E}\hss}}%
  $\endgroup
%    \end{macrocode}
%
%    \begin{macrocode}
  \dimen0=\f@baselineskip
  \fontencoding{OMS}\fontfamily{cmsy}\fontseries{m}%
  \fontshape{n}%
  \fontsize{\f@size}{\dimen0}%
  \selectfont
%    \end{macrocode}
% \newpage
% Anceps
% 
%    \begin{macrocode}
  \begingroup
  \relsize{-2}%
  \global\setbox0=\hbox{\symbol{"02}}%
  \global\setbox\M@box@a=%
    \hbox to .675\wd0{\hss\symbol{"02}\hss}%
  \endgroup
  \global\ht\M@box@a=.82\ht0 
  \global\dp\M@box@a=\z@
%    \end{macrocode}
% 
% Circle
% 
%    \begin{macrocode}
  \dimen0=\f@baselineskip
  \begingroup
  \relsize{+1}%
  \fontsize{\f@size}{\dimen0}%
  \selectfont
  \setbox0=\hbox{\symbol{"0E}}%
  \global\setbox\M@box@o=\hbox to .733\wd0{\hss%
    \lower .08\M@metra@ex\hbox{\symbol{"0E}}\hss}%
  \endgroup
  \global\ht\M@box@o=.8\ht0 
  \global\dp\M@box@o=\z@
  \endgroup
}
%    \end{macrocode}
%
% \subsubsection{Generating the symbols} 
%
% All the dirty work done in |\M@makeboxes| pays off now.  Putting
% the symbols together is child's play, like stacking
% LEGO{\kern .1em \raise 1ex \hbox{\tiny \textregistered}} 
% pieces.
%
% The general scheme is that, for each user command |\|\textit{x},
% there is a macro |\M@@|\textit{x} that sets the symbol and a macro
% |\M@|\textit{x} which calls |\M@@|\textit{x} and takes care of 
% \textit{inter signa} spacing.
%
%    \begin{macrocode}
\def\M@s{\kern \M@dim@s \nobreak}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@m{\copy\M@box@m}
\def\M@m{\M@head \M@@m \M@tail}
\def\M@M{\M@head \M@acutus \M@@m \M@tail}
\def\M@gM{\M@head \M@gravis \M@@m \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@lm{\M@@m \kern -\wd\M@box@m \kern \wd\M@box@b \M@@m}
\def\M@lm{\M@head \M@@lm \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@b{\hbox{\M@en@check{\M@dim@bsink}\copy \M@box@b}}
\def\M@b{\M@head \M@@b \M@tail}
\def\M@B{\M@head \M@acutus \M@@b \M@tail}
\def\M@gB{\M@head \M@gravis \M@@b \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@a{%
    \M@head \M@en@check{.4\ht\M@box@a}\copy\M@box@a
    \M@dirty@trick\M@box@a \M@tail}
\def\M@@ma{%
  \M@en@check{.4\ht\M@box@a}\M@stack{\M@box@m}{\M@box@a}}
\def\M@ma{\M@head   \M@@ma \M@tail}
\def\M@Ma{\M@head \M@acutus \M@@ma \M@tail}
\def\M@gMa{\M@head \M@gravis \M@@ma \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@o{%
  \M@head \M@en@check{.4\ht\M@box@o}\copy \M@box@o \M@tail}
\def\M@oo{\M@o \M@o}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@bb{\M@@b\M@@b}
\def\M@bb{\M@head \M@@bb \M@tail}
\def\M@Bb{\M@head \M@A{.5}\M@@b \M@@b \M@tail}
\def\M@gBb{\M@gravistrue \M@Bb \M@gravisfalse}
\def\M@bB{\M@head \M@@b \M@A{.5}\M@@b \M@tail}
\def\M@gbB{\M@gravistrue \M@bB \M@gravisfalse}
\def\M@BB{\M@head \M@acutus \M@@bb \M@tail}
\def\M@gBB{\M@head \M@gravis \M@bb \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@bm{%
  \setbox0=\M@stack{\M@box@b}{\M@box@m}%
  \dimen0=\M@dim@bsink
  \advance \dimen0 by \M@intervallum\M@metra@ex
  \advance \dimen0 by \ht\M@box@m
  \M@en@check{\dimen0}\box0\relax 
}
\def\M@bm{\M@head \M@@bm \M@tail}
\def\M@Bm{\M@head \M@acutus \M@@bm \M@tail}
\def\M@gBm{\M@head \M@gravis \M@bm \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@mb{%
 \setbox0=\M@stack{\M@box@m}{\M@box@b}%
 \M@en@check{\M@dim@bsink}\box0\relax
}
\def\M@mb{\M@head \M@@mb \M@tail}
\def\M@Mb{\M@head \M@acutus \M@@mb \M@tail}
\def\M@gMb{\M@head \M@gravis \M@mb \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@mbb{\M@@mb \kern -\wd\M@box@m \kern \wd\M@box@b \M@@mb}
\def\M@mbb{\M@head \M@@mbb \M@tail}
\def\M@Mbb{\M@head \M@acutus \M@@mbb \M@tail}
\def\M@mBb{\M@head \M@acutus[.25]\M@@mbb \M@tail}
\def\M@mbB{\M@head \M@acutus[.75]\M@@mbb \M@tail}
\def\M@gMbb{\M@head \M@gravis \M@@mbb \M@tail}
\def\M@gmBb{\M@head \M@gravis[.25]\M@@mbb \M@tail}
\def\M@gmbB{\M@head \M@gravis[.75]\M@@mbb \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@bbm{\M@@bm \kern -\wd\M@box@m \kern \wd\M@box@b \M@@bm}
\def\M@bbm{\M@head \M@@bbm \M@tail}
\def\M@BBm{\M@head \M@acutus \M@@bbm \M@tail}
\def\M@Bbm{\M@head \M@acutus[.25]\M@@bbm \M@tail}
\def\M@bBm{\M@head \M@acutus[.75]\M@@bbm \M@tail}
\def\M@gBBm{\M@head \M@gravis \M@@bbm \M@tail}
\def\M@gBbm{\M@head \M@gravis[.25]\M@@bbm \M@tail}
\def\M@gbBm{\M@head \M@gravis[.75]\M@@bbm \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@bba{%
 \edef\M@opt@save{\M@opt@style}%
 \def\M@opt@style{0}%
 \setbox0=\hbox{\M@@bb}%
 \edef\M@opt@style{\M@opt@save}%
 \setbox0=\hbox to \wd0{\hss\M@stack{0}{\M@box@a}\hss}%
 \M@en@check{.5\ht\M@box@a}\box0\relax
}
\def\M@bba{\M@head \M@@bba \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@bbb{%
 \edef\M@opt@save{\M@opt@style}%
 \def\M@opt@style{0}%
 \setbox0=\hbox{\M@@bb}%
 \edef\M@opt@style{\M@opt@save}%
 \setbox0=\hbox to \wd0{\hss\M@stack{0}{\M@box@b}\hss}%
 \M@en@check{\M@dim@bsink}\box0\relax
}
\def\M@bbb{\M@head \M@@bbb \M@tail}
%    \end{macrocode}
%
% This strange symbol needs some extra work.
%
%    \begin{macrocode}
\def\M@bbmb{%
  \M@head
  \dimen0=\M@intervallum\M@metra@ex 
  \if 2\M@opt@style %                the [En] option
    \edef\M@opt@save{\M@opt@style}%
    \def\M@opt@style{0}%
    \setbox0=\hbox{\M@@lm}% 
    \copy0 
    \kern -\wd0 
    \dimen1=\dimen0 
    \advance \dimen1 by \ht\M@box@b
    \lower \dimen1 \hbox to \wd0{\hss\M@@b\hss}%
    \global\M@dim@sunk=\dimen1
    \kern -\wd0 
    \dimen1=\dimen0 
    \advance \dimen1 by \ht\M@box@m
    \raise \dimen1 \hbox to \wd0{\hss\M@@bb\hss}%
    \edef\M@opt@style{\M@opt@save}%
  \else
    \edef\M@opt@save{\M@opt@style}%
    \def\M@opt@style{0}%
    \setbox0=\hbox{\M@@bbm}% 
    \edef\M@opt@style{\M@opt@save}%
    \global\M@dim@sunk=\z@
    \hbox to \wd0{\hss\M@@b\hss}%
    \kern -\wd0 
    \advance \dimen0 by \ht\M@box@b
    \advance \dimen0 by -\M@dim@sunk
    \raise \dimen0 \box0 
  \fi
  \M@tail
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@p{%
  \M@head
  \if 0\M@opt@style
    \relax
  \else
    \lower .5\ht\M@box@p
  \fi
  \copy\M@box@p
  \M@tail
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@pm{%
  \setbox0=\hbox{\hss\copy\M@box@p\hss}%
  \M@stack{0}{\M@box@m}%
}
\def\M@pm{\M@head   \M@@pm \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@ppm{%
  \setbox0=\hbox{\copy\M@box@p\kern .33\wd\M@box@p\copy\M@box@p}%
  \M@stack{0}{\M@box@m}%
}
\def\M@ppm{\M@head \M@@ppm \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@pppm{%
  \M@head
  \setbox0=\hbox{\M@@ppm}%
  \ht0=1.2\ht0 
  \M@stack{\M@box@p}{0}%
  \M@tail
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@pp{%
  \setbox0=\vbox{\copy\M@box@p
                 \nointerlineskip\kern 2\M@dim@bsink
                 \copy\M@box@p
  }%
  \M@en@caesura{.25\M@dim@bsink}%
}
\def\M@pp{\kern \M@dim@c@ext \M@@pp \kern \M@dim@c@ext
          \M@interfalse}
\def\M@Pp{\kern \M@dim@c@Ext \M@@pp \kern \M@dim@c@Ext
          \M@interfalse}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@pxp{%
  \setbox0=\vbox{\vskip 1.125\M@dim@bsink
                 \nointerlineskip \vskip .5\ht\M@box@p
                 \copy\M@box@p
                 \nointerlineskip \vskip 2.25\M@dim@bsink
                 \copy\M@box@p
                 \nointerlineskip \vskip 1.125\M@dim@bsink
                 \nointerlineskip \vskip .5\ht\M@box@p
  }%
  \M@en@caesura{1\M@dim@bsink}%
}
\def\M@pxp{\kern \M@dim@c@ext \M@@pxp \kern \M@dim@c@ext
          \M@interfalse}
\def\M@Pxp{\kern \M@dim@c@Ext \M@@pxp \kern \M@dim@c@Ext
          \M@interfalse}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@ppp{%
  \setbox0=\vbox{\copy\M@box@p
                 \nointerlineskip\vskip 2.25\M@dim@bsink
                 \copy\M@box@p
                 \nointerlineskip\vskip 2.25\M@dim@bsink
                 \copy\M@box@p
  }%
  \M@en@caesura{1\M@dim@bsink}%
}
\def\M@ppp{\kern \M@dim@c@ext \M@@ppp \kern \M@dim@c@ext
           \M@interfalse}
\def\M@Ppp{\kern \M@dim@c@Ext \M@@ppp \kern \M@dim@c@Ext
           \M@interfalse}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@pppp{%
  \setbox0=\vbox{\copy\M@box@p
                 \nointerlineskip\vskip 1.26\M@dim@bsink
                 \copy\M@box@p
                 \nointerlineskip\vskip 1.26\M@dim@bsink
                 \copy\M@box@p
                 \nointerlineskip\vskip 1.26\M@dim@bsink
                 \copy\M@box@p
  }%
  \M@en@caesura{1\M@dim@bsink}%
}
\def\M@pppp{\kern \M@dim@c@ext \M@@pppp \kern \M@dim@c@ext
            \M@interfalse}
\def\M@Pppp{\kern \M@dim@c@Ext \M@@pppp \kern \M@dim@c@Ext
            \M@interfalse}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@ppppp{%
  \setbox0=\vbox{\copy\M@box@p
                 \nointerlineskip\vskip .775\M@dim@bsink
                 \copy\M@box@p
                 \nointerlineskip\vskip .775\M@dim@bsink
                 \copy\M@box@p
                 \nointerlineskip\vskip .775\M@dim@bsink
                 \copy\M@box@p
                 \nointerlineskip\vskip .775\M@dim@bsink
                 \copy\M@box@p
  }%
  \M@en@caesura{\M@dim@bsink}%
}
\def\M@ppppp{\kern \M@dim@c@ext \M@@ppppp \kern \M@dim@c@ext
             \M@interfalse}
\def\M@Ppppp{\kern \M@dim@c@Ext \M@@ppppp \kern \M@dim@c@Ext
             \M@interfalse}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@vppm{%
  \setbox0=\hbox{\M@@pm}%
  \ht0=1.3\ht0 
  \M@stack{\M@box@p}{0}%
}
\def\M@vppm{\M@head \M@@vppm \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@vpppm{%
  \setbox0=\hbox{\M@@vppm}%
  \ht0=1.15\ht0 
  \M@stack{\M@box@p}{0}%
}
\def\M@vpppm{\M@head \M@@vpppm \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@caesura{%
  \setbox0=\hbox{%
             \vrule width .03em depth .21\M@metra@ex
             height 1.25\M@metra@ex
  }%
  \M@en@caesura{\z@}%
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@C{\kern \M@dim@c@Ext \M@caesura \kern \M@dim@c@Ext
         \M@interfalse}
\def\M@c{\kern \M@dim@c@ext \M@caesura \kern \M@dim@c@ext
         \M@interfalse}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@cc{\kern \M@dim@c@ext \M@caesura \kern \M@dim@c@int
                             \M@caesura \kern \M@dim@c@ext
                             \M@interfalse}
\def\M@Cc{\kern \M@dim@c@Ext \M@caesura \kern \M@dim@c@int
                             \M@caesura \kern \M@dim@c@Ext
                             \M@interfalse}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@ccc{\kern \M@dim@c@ext \M@caesura \kern \M@dim@c@int
                              \M@caesura \kern \M@dim@c@int
                              \M@caesura \kern \M@dim@c@ext
                              \M@interfalse}
\def\M@Ccc{\kern \M@dim@c@Ext \M@caesura \kern \M@dim@c@int
                              \M@caesura \kern \M@dim@c@int
                              \M@caesura \kern \M@dim@c@Ext
                              \M@interfalse}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@v{%
  \begingroup
  \M@text@fontsize
  \setbox0=\hbox{,},\kern -\wd0 \kern \M@dim@s
  \endgroup
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@r{\M@bigfalse\M@@r}
\def\M@R{\M@bigtrue\M@@r}
\newcommand{\M@@r}[1][0]{\leavevmode
  \M@head
  \setbox0=\hbox{%
    $\ifM@big \scriptstyle 
      \else \scriptscriptstyle \fi \sim$\unskip}%
  \dimen0=\ifM@big -.05\else .1\fi\M@metra@ex
  \advance \dimen0 by #1\M@metra@ex
  \if 0\M@opt@style
    \relax
  \else
    \advance \dimen0 by -\M@dim@bsink
  \fi
  \raisebox {\dimen0}[\z@][\z@]{\copy0}%
  \M@dirty@trick 0\relax 
  \M@tail
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@t{\M@bigfalse\M@@t}
\def\M@T{\M@bigtrue\M@@t}
\newcommand{\M@@t}[1][0]{\leavevmode
  \M@head
  \setbox0=\hbox{%
    $\ifM@big \scriptstyle \else
              \scriptscriptstyle \fi \otimes$\unskip}%
  \dimen0=\ifM@big -.05 \else .1 \fi \M@metra@ex
  \advance \dimen0 by #1\M@metra@ex
  \if 0\M@opt@style
    \relax
  \else
    \advance \dimen0 by -\M@dim@bsink
  \fi
  \raisebox {\dimen0}[\z@][\z@]{\copy0}%
  \M@dirty@trick 0\relax 
  \M@tail
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@x{%
  \M@head
  \setbox0=\vbox{\copy\M@box@p
                 \nointerlineskip\kern 2\M@dim@bsink
                 \copy\M@box@p
  }%
  \setbox0=\hbox{\copy0\kern \wd\M@box@p \copy0}%
  \M@en@check{.5\ht0}%
  \copy0 
  \M@tail
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@tsmb{\M@head \copy\M@box@tsmb \M@tail}
\def\M@tsbm{\M@head \copy\M@box@tsbm \M@tail}
\def\M@tsmm{\M@head \copy\M@box@tsmm \M@tail}
\def\M@ps{\M@head \copy\M@box@ps \M@tail}
%    \end{macrocode}
%
% \subsubsection{Service macros} 
%
% Switch to CMR OT1.
%
%    \begin{macrocode}
\def\M@cmr{\fontencoding{OT1}\fontfamily{cmr}\fontseries{m}%
  \fontshape{n}\selectfont
}
%    \end{macrocode}
%
% Generate \textit{inter signa} spacing.
%
%    \begin{macrocode}
\def\M@head{\leavevmode
  \ifM@inter
    \expandafter\hskip\M@interS\M@dim@m\relax
  \fi
  \M@interfalse
  \M@vert@barfalse
}
\def\M@tail{\M@intertrue}
%    \end{macrocode}
%
% Stack one box on top of another, keeping them centered
% around the vertical axis.
%
%    \begin{macrocode}
\def\M@stack#1#2{%
  \hbox{%
    \dimen0=\wd#1\relax
    \ifdim \dimen0<\wd#2\relax 
      \dimen0=\wd#2\relax
    \fi
    \dimen1=\ht#2\relax
    \advance \dimen1 by \M@intervallum\M@metra@ex
    \hbox to \dimen0{\hss\copy#2\hss}%
    \kern -\dimen0 
    \raise \dimen1 \hbox to \dimen0{\hss\copy#1\hss}%
  }%
}
%    \end{macrocode}
%  
% This macro (used by |\tie| and |\n|) stacks |\box1| over
% (|\dimen2|\textgreater0) or under (|\dimen2|\textless0) |\box0|.
% |\dimen2| holds the amount by which to raise/lower; |\dimen3| the
% (possible) correction for \textit{inter signa} space.
%
% |\box0| is actually set only if the parameter is 0.
%  
%    \begin{macrocode}
\def\M@Stack#1{%
  \ifnum #1=\z@
    \copy0 
  \fi
  \dimen0=\wd0 
  \advance \dimen0 by -\dimen3  
  \advance \dimen0 by \wd1 
  \kern -.5\dimen0 
  \raisebox {\dimen2}[\z@][\z@]{\copy1}%
  \dimen0=\wd0 
  \advance \dimen0 by -\wd1 
  \advance \dimen0 by -\dimen3 
  \dimen0=.5\dimen0 
  \kern \dimen0\relax 
}
%    \end{macrocode}
%
% If using the English style, lower the box and remember the amount
% by which it has been lowered.
%
%    \begin{macrocode}
\def\M@en@check#1{%
  \if 0\M@opt@style
    \relax
  \else
    \global\M@dim@sunk=#1\relax
    \lower #1\relax
  \fi
}
%    \end{macrocode}
%
% If using the English style, lower the \textit{caesura} symbols so
% that they come out in the same position as in the standard style.
%
%    \begin{macrocode}
\def\M@en@caesura#1{%
   \dimen0=\if 0\M@opt@style 0\else .5\fi\M@text@ex
   \advance \dimen0 by \M@subS\M@text@ex
   \advance \dimen0 by #1\relax 
   \lower \dimen0 \copy0 
   \M@vert@bartrue
}
%    \end{macrocode}
%
% \subsubsection{Placing marks on symbols} 
%
% Put an accent over a symbol.
%
%    \begin{macrocode}
\newcommand{\M@acutus}[2][.5]{%
  \M@head \M@A{#1}{#2}\M@tail}
\newcommand{\M@gravis}[2][.5]{%
  \M@gravistrue \M@A{#1}{#2}\M@gravisfalse}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@A#1#2{%
  \setbox1=\hbox{#2}%
  \dimen1=\ht1 
  \dimen2=\ht\M@box@b
  \if 0\M@opt@style
     \relax
  \else
     \advance \dimen2 by -\M@dim@sunk 
  \fi
  \ifdim \dimen1<\dimen2 
    \dimen1=\dimen2 
  \fi
  \copy1\relax
  \dimen0=#1\wd1 
  \advance \dimen0 by -1.5\wd1 
  \kern \dimen0 
  \raise \dimen1 
    \hbox to \wd1{%
      \hss
      \ifM@gravis
        \ifdim \wd1>\M@dim@m 
          \kern -.1\wd\M@box@G
        \fi
        \copy\M@box@G
      \else 
        \ifdim \wd1>\M@dim@m
          \kern .1\wd\M@box@A
        \fi
        \copy\M@box@A
      \fi
      \hss
    }%
  \dimen0=#1\wd1 
  \advance \dimen0 by -.5\wd1 
  \kern -\dimen0\relax 
}
%    \end{macrocode}
%
% Put the mark for \textit{catalexis} under a symbol.
%
%    \begin{macrocode}
\def\M@k#1{\M@head  \M@@Kk{#1}{\M@box@k}\relax \M@tail}
\def\M@K#1{\M@head  \M@@Kk{#1}{\M@box@K}\relax \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@Kk#1#2{%
  \global\M@dim@sunk=\z@
  \setbox1=\hbox{#1}%
  \dimen1=.667\ht\M@box@b
  \ifx #2\M@box@K
    \dimen1=1.33\dimen1 
  \fi
  \advance \dimen1 by \M@dim@sunk
  #1\relax
  \kern -\wd1 
  \raisebox {-\dimen1}[\z@][\z@]%
    {\hbox to \wd1{\hss\copy#2\hss}}%
}
%    \end{macrocode}
%
% Put some kind of quotation marks around the argument .
%
%    \begin{macrocode}
\def\M@q#1#2{\M@head \M@@q{#1}{0}{#2}\relax \M@tail}
\def\M@Q#1#2{\M@head \M@@q{#1}{1}{#2}\relax \M@tail}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@q#1#2#3{%
  \dimen0=\z@
  \if 0\M@opt@style
    \relax
  \else
    \advance \dimen0 by -\M@dim@bsink
  \fi
  \dimen1=\z@
  \def\M@q@size{4}% 
  \def\M@Q@size{2}% 
  \ifx !#1\relax
    \def\M@q@ante{\M@cmr\texttt{\char"0D}}%
    \def\M@q@post{\M@cmr\texttt{\char"0D}}%
    \dimen1=-.075em
  \else \ifx '#1\relax
    \def\M@q@ante{\M@cmr\char"60}%
    \def\M@q@post{\M@cmr\char"27}%
  \else \ifx (#1\relax
    \def\M@q@ante{%
      \fontencoding{OML}\fontfamily{cmm}\fontseries{m}%
      \fontshape{it}\selectfont\symbol{"2C}}%
    \def\M@q@post{%
      \fontencoding{OML}\fontfamily{cmm}\fontseries{m}%
      \fontshape{it}\selectfont\symbol{"2D}}%
    \def\M@q@size{6}% 
    \def\M@Q@size{5}% 
    \advance \dimen0 by .33ex
    \dimen1=.05em
  \else \ifx "#1\relax
    \def\M@q@ante{\M@cmr\char"5C}%
    \def\M@q@post{\M@cmr\char"22}%
    \dimen1=.05em
  \else \ifx <#1\relax
    \def\M@q@ante{%
      \fontencoding{U}\fontfamily{lasy}%
      \fontseries{b}\fontshape{n}%
      \selectfont\symbol{"28}%
      \kern -.2em\symbol{"28}\kern .1em\relax}%
    \def\M@q@post{%
      \fontencoding{U}\fontfamily{lasy}%
      \fontseries{b}\fontshape{n}%
      \selectfont\kern .1em\symbol{"29}%
      \kern -.2em\symbol{"29}}%
    \def\M@q@size{5}% 
    \def\M@Q@size{3}% 
    \dimen1=-.05em
    \advance \dimen0 by .33ex
  \else
      \PackageError{metre}%
        {Invalid character after %
         \protect\q \space or \protect\Q}%
        {Valid characters are:  \protect( %
         \protect' \protect" %
         \protect! \protect<}%
  \fi\fi\fi\fi\fi
  \raise \dimen0 \hbox{%
    \begingroup
    \relsize{-\if 1#2\M@Q@size\else \M@q@size\fi}%
    \setbox0=\hbox{\M@q@ante}%
    \copy0 
    \endgroup
  }%
  \M@dirty@trick 0\relax 
  \leavevmode \kern \dimen1
  {\M@interfalse#3}% 
  \leavevmode \kern \dimen1
  \raise \dimen0 \hbox{%
    \begingroup
    \relsize{-\if 1#2\M@Q@size\else \M@q@size\fi}%
    \setbox0=\hbox{\M@q@post}%
    \copy0 
    \endgroup
  }%
  \M@dirty@trick 0\relax
}
%    \end{macrocode}
%
% Put a \textit{caesura} in the middle of a symbol.
%
%    \begin{macrocode}
\def\M@d#1{\M@head  \M@@d#1\relax \M@tail}
\def\M@@d#1{%
  \setbox1=\hbox{#1}%
  #1\relax \kern -\wd1 
  \hbox to \wd1{\hfill \M@caesura \hfill}%
}
%    \end{macrocode}
%
% Raise text to superscript.
%
%    \begin{macrocode}
\newcommand{\M@super@metra}[2][0]{%
  \begingroup
  \tiny
  \setbox0=\hbox{#2}%
  \dimen0=1.25\M@metra@ex
  \advance \dimen0 by
    \if 0\M@opt@style 
      \z@
    \else
      \ifM@vert@bar -.5\M@text@ex \else -\M@dim@bsink \fi
    \fi
  \advance \dimen0 by \M@subS\M@text@ex
  \advance \dimen0 by -\ht0 
  \advance \dimen0 by #1\M@metra@ex 
  \raise \dimen0 \hbox{\kern .05\wd0#2}%
  \endgroup
  \M@vert@barfalse
}
%    \end{macrocode}
%
% \subsubsection{A very dirty trick} 
%
% This seemingly absurd piece of code solves a very annoying and 
% mysterious problem that occurs after symbols taken from the math font.
% The problem can be seen by turning the macro into a no-op and
% compiling this text:\par
% \quad\quad |\metra{\a\bbm}\par\metra{\a\bbm}|\par
% Depending on the DVI driver and the font in use, you may see nothing amiss;
% but, more likely, you will find that in one of the metrical schemes 
% (usually the second) a very thin space has crept under the first
% \textit{macron}.  The problem seems to arise from the change of
% |\baselineskip| due to the font switch and, from some experiments
% I have done, I got the impression that it occurs within the DVI
% driver itself (I could see nothing in the DVI file that would account for
% the thin space).  In any case, this cannot be considered a bug,
% as Knuth obviously had no reason to envisage the unorthodox use to which
% math symbols are put in |metre|.
% 
% After spending an inordinate amount of time hunting for a solution,
% I finally hit upon the idea behind this dirty trick.
% The question mark, being raised by 1 metre (actually 1 metre plus
% a whisker), buffers the shock of the font switch and then vanishes
% harmlessly into empty space.
%
% The macro parameter is the identifier of the box containing the math symbol.
%    \begin{macrocode}
\def\M@dirty@trick#1{%
  \kern -\wd#1\relax
  \raisebox {100cm}[\z@][\z@]{\hbox to \wd#1{\hss?\hss}}%
}
%    \end{macrocode}
%
% \subsubsection{Placing annotations on symbols}
%
%    \begin{macrocode}
\newcommand{\M@n}[3][1]{\M@@n{\hss#2\hss}{#3}{0}{#1}{0}}
\newcommand{\M@ni}[3][1]{\M@@n{\hss#2\hss}{#3}{1}{#1}{0}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@n#1#2#3#4#5{%
%    \end{macrocode}
%  All the work is done by |\M@@n|:
%
%  |#1| is the text to be set above or below |#2| depending on the value
%  of |#3| (0~= above, 1 = below) at a distance that may be modified
%  by |#4|.
%
%  The box containing |#2| is generated only if |#5| = 0
%
%    \begin{macrocode}
  \M@head
  \global\M@dim@sunk=\z@
  \ifM@inter
    \dimen3=\M@interS\M@dim@m
  \else
    \dimen3=\z@
  \fi
  \setbox0=\hbox{#2}%
  \begingroup
  \tiny \global\setbox1=\hbox{#1}%
  \endgroup
  \dimen2=\M@intervallum\M@metra@ex
  \dimen2=1.5\dimen2 
  \ifnum #3=\z@
    \advance \dimen2 by \dp1 
    \advance \dimen2 by \ht0 
  \else
    \dimen2=-\dimen2 
    \advance \dimen2 by -\ht1 
    \advance \dimen2 by -\M@dim@sunk
  \fi
  \dimen2=#4\dimen2 
  \M@Stack#5\relax 
  \M@tail
}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\M@N}[4][1]{%
  \M@@n{%
    \ifx #3\mbbx
      \hfil #2\relax \hfil \kern \M@dim@b
    \else
      \ifx #3\bbmx
        \kern \M@dim@b \hfil #2\relax \hfil
      \else
        \hfil #2\relax \hfil
      \fi
    \fi
  }{#3}{0}{#1}{0}%
  \M@interfalse
  \M@@n{%
    \ifx #3\mbbx
      \kern \M@dim@b \hfil #4\relax \hfil
    \else
      \ifx #3\bbmx
        \hfil #4\relax \hfil \kern \M@dim@b
      \else
        \hfil #4\relax \hfil
      \fi
    \fi
  }{#3}{1}{#1}{1}%
}
%    \end{macrocode}
%
% These two odd symbols are defined here because
% they do not make much sense except as arguments of |\N|.
%
%    \begin{macrocode}
\def\M@mbbx{%
  \M@head
  \setbox0=\hbox{\M@@mbb}%
  \if 0\M@opt@style
    \dimen0=\M@intervallum\M@metra@ex
    \setbox1=\hbox{\m}%
    \advance \dimen0 by \ht1 
    \raise \dimen0 
  \fi
  \copy0 \kern -\M@dim@m
  \M@interfalse \M@@bbm
  \M@tail
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@bbmx{%
  \M@head
  \setbox0=\hbox{\M@@bbm}%
  \copy0 
  \dimen2=\M@dim@sunk
  \kern -\M@dim@m \M@interfalse
  \if 0\M@opt@style
    \dimen0=\M@intervallum\M@metra@ex
    \setbox1=\hbox{\m}%
    \advance \dimen0 by \ht1 
    \raise \dimen0 
  \fi
  \hbox{\M@@mbb}%
  \global\M@dim@sunk=\dimen2 
  \M@tail
}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\numeri}[1]{\M@numeri#1\end}
\def\M@numeri#1:#2\end{\bgroup\tiny{\it #1}:%
  \kern .2em#2\egroup}
%    \end{macrocode}
%
% \subsection{The \texttt{metrica} environment}
%
% Define abbreviations for common commands
%
%    \begin{macrocode}
\def\M@abbrev{%
  \def\c{\metra{\c}}%
  \def\C{\metra{\C}}%
  \def\cc{\metra{\cc}}%
  \def\Cc{\metra{\Cc}}%
  \def\ccc{\metra{\ccc}}%
  \def\Ccc{\metra{\Ccc}}%
  \def\p{\metra{\p}}%
  \def\pp{\metra{\pp}}%
  \def\Pp{\metra{\Pp}}%
  \def\ppp{\metra{\ppp}}%
  \def\Ppp{\metra{\Ppp}}%
  \def\pppp{\metra{\pppp}}%
  \def\Pppp{\metra{\Pppp}}%
  \def\ppppp{\metra{\ppppp}}%
  \def\Ppppp{\metra{\Ppppp}}%
  \def\pxp{\metra{\pxp}}%
  \def\Pxp{\metra{\Pxp}}%
  \def\pos{\positio}%
  \def\Pos{\Positio}%
  \def\!{\dubia}%
  \let\e=\Elevatio
  \let\t=\Translatio
}
%    \end{macrocode}
% 
%    \begin{macrocode}
\newenvironment{metrica}[1][\relax]{\leavevmode
  \ifx n#1\relax
  \else
    \ifx N#1\relax
    \else
      \ifx \relax#1\relax
        \M@abbrev
      \else
        \PackageError{metre}{%
          Invalid optional parameter for %
            the metrica environment}%
          {The optional parameter must be either `n' or `N'}%
      \fi
    \fi
  \fi
%    \end{macrocode}
%
% Define the commands for prosodical marks.
%
%    \begin{macrocode}
  \def\={\M@tempus{2}}%
  \def\-{\M@tempus{1}}%
  \let\u=\-%
  \ignorespaces
  }{}%                     
%    \end{macrocode}
%
% Place a macron (|#1| = 2) or a breve (|#1| = 1) over |#2|.
%
%    \begin{macrocode}
\def\M@tempus#1#2{\leavevmode
  \def\M@accent{\relax}%
  \if '#2\relax
    \def\M@accent{19}%
  \else
    \if `#2\relax
      \def\M@accent{18}%
    \fi
  \fi
  \let\next=\relax  
  \if \M@accent\relax
    \def\M@char{#2}%
    \let\next=\M@@tempus%        no accent    
  \else
    \let\next=\M@@@tempus%       accent
  \fi
  \next{#1}%
}
\def\M@@@tempus#1#2{%
    \def\M@char{#2}%
    \M@@tempus#1\relax   
}
\def\M@ij#1#2\end{%
  \ifx i#1\relax
    \def\M@char{\i}%
  \else
    \ifx j#1\relax
      \def\M@char{\j}%
    \else
      \def\M@char{#1}%
    \fi
  \fi
  \ifx i#2\relax
    \edef\M@char{\M@char\i}%
  \else
    \ifx j#2\relax
      \edef\M@char{\M@char\j}%
    \else
      \edef\M@char{\M@char#2}%
    \fi
  \fi
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@tempus#1{%
  \dimen0=1ex
  \dimen0=\M@elevatio\dimen0 
  \ifdim \dimen0=\z@
    \expandafter\M@ij\M@char\end
  \fi
  \dimen3=1em
  \dimen3=\M@translatio\dimen3 
  \setbox0=\hbox{\M@char}%
  \dimen1=\wd0 
  \dimen2=\dimen0  
  \ifdim \dimen0=\z@
    \ifdim \wd0=\z@  
      \dimen2=1ex
    \else
      \dimen2=\ht0 
    \fi
  \fi
  \setbox0=\hbox{%
    \M@char
    \kern -\dimen1 
    \kern \dimen3
    \raise \dimen2 \hbox to \dimen1{%
      \begingroup
      \M@cmr
      \hss
      \raisebox {-1ex}[\z@][\z@]{\hbox{\char2#1}}%
      \hss
      \endgroup
    }%
    \kern -\dimen3
  }%
%    \end{macrocode}
%
% Adjust the height to account for the accent.
%
%    \begin{macrocode}
  \ht0=1.3\ht0 
%    \end{macrocode}
%
% Check for an accent. 
%
%    \begin{macrocode}
  \if \M@accent\relax
%    \end{macrocode}
%
% If no accent, just set the box.
%
%    \begin{macrocode}
    \copy0 
  \else
%    \end{macrocode}
%
% otherwise put the accent on top of the macron or breve.
%
%    \begin{macrocode}
    \ifdim \dimen0=\z@
      \dimen0=1.05\ht0 
    \else
      \ifdim \dimen0<\z@
        \dimen0=.8\dimen0 
      \else
        \dimen0=1.2\dimen0 
      \fi
    \fi
    \copy0
    \kern -\wd0 
    \kern \dimen3
    \raise \dimen0 \hbox to \wd0{%
      \begingroup
      \M@cmr
      \hss
      \lower 1ex \hbox{\expandafter\char\M@accent}%
      \hss
      \endgroup
    }%
    \kern -\dimen3
  \fi
}
%    \end{macrocode}
%
% \subsection{The \texttt{metrike} environment}
%
% This is much the same as the |metrica| environment.
% Accents and other diacritical marks are taken care of by |ibycus4| or
% |Babel|.
%
%    \begin{macrocode}
\newenvironment{metrike}[1][\relax]{\leavevmode
  \ifx n#1\relax
  \else
    \ifx N#1\relax
    \else
      \ifx \relax#1\relax
        \M@abbrev
      \else
        \PackageError{metre}{%
          Invalid optional parameter for %
            the metrike environment}%
          {The optional parameter must be either `n' or `N'}%
      \fi
    \fi
  \fi
  \def\={\M@gtempus{2}}%
  \def\-{\M@gtempus{1}}%
  \let\u=\-%
  \ifx \M@MetrikeFont \@undefined
    \ifnum \M@ibycus=\@ne
      \def\M@@MF{\fontencoding{OT1}\greek}%
    \else
      \ifx \l@greek \@undefined
        \PackageError{metre}{No font available for Greek text}%
          {You must use the \protect\MetrikeFont command}%
      \else
        \def\M@@MF{\selectlanguage{polutonikogreek}}%
      \fi
    \fi
  \else
    \if i\M@MetrikeFont
      \def\M@@MF{\fontencoding{OT1}\greek}%
    \else
      \if I\M@MetrikeFont
        \def\M@@MF{\fontencoding{OT1}\greek}%
      \else
        \if b\M@MetrikeFont
          \def\M@@MF{\selectlanguage{polutonikogreek}}%
        \else
          \if B\M@MetrikeFont
            \def\M@@MF{\selectlanguage{polutonikogreek}}%
          \else
            \def\M@@MF{\M@MetrikeFont}%
          \fi
        \fi
      \fi
    \fi
  \fi
  \M@@MF
  \ignorespaces
  }{}%
%    \end{macrocode}
%
% Place a macron (|#1| = 2) or a breve (|#1| = 1) over |#2|.
%
%    \begin{macrocode}
\def\M@gtempus#1#2{\leavevmode
  \setbox0=\hbox{#2}%
  \dimen0=1ex
  \dimen0=\M@elevatio\dimen0 
  \ifdim \dimen0=\z@ 
    \dimen0=\ht0 
  \fi
  \dimen3=1em
  \dimen3=\M@translatio\dimen3 
  \copy0
  \kern -\wd0 
  \dimen1=\wd0  
  \setbox1=\hbox{\M@bare #2\end}%
  \advance \dimen1 by -\wd1 
  \kern \dimen1
  \kern \dimen3
  \raise \dimen0 \hbox to \wd1{%
    \begingroup
    \hss
    \M@cmr
    \raisebox {-1ex}[\z@][\z@]{\hbox{\char2#1}}%
    \hss
    \endgroup
  }%
  \kern -\dimen3\relax
}
%    \end{macrocode}
% \newpage
% Compute the width of the bare letter, without diacritics.
%    \begin{macrocode}
\def\M@bare#1{%
  \let\next=\M@bare
  \ifnum \M@ibycus=\@ne
    \ifx #1\end
      \let\next=\relax
    \else \ifx '#1\relax
    \else \ifx `#1\relax
    \else \ifx (#1\relax
    \else \ifx )#1\relax
    \else \ifx =#1\relax
    \else \ifx |#1\relax
    \else
      #1\relax
    \fi\fi\fi\fi\fi\fi\fi
  \else
    \ifx #1\end
      \let\next=\relax
    \else \ifx '#1\relax
    \else \ifx `#1\relax
    \else \ifx <#1\relax
    \else \ifx >#1\relax
    \else \ifx ~#1\relax
    \else \ifx |#1\relax
    \else
      #1\relax
    \fi\fi\fi\fi\fi\fi\fi
  \fi
  \next
}
%    \end{macrocode}
%
% \subsection{The \texttt{\protect\bslash sigla} command}
%
% The |\sigla| command uses a few active characters.
%    \begin{macrocode}
\begingroup
\catcode`\:=\active
\catcode`\/=\active
\catcode`\_=\active
\catcode`<=\active
\catcode`>=\active
\gdef\sigla{%
  \begingroup%      \endgroup in \M@sigla
  \dimen1=.056em
  \catcode`\:=\active
  \catcode`\/=\active
  \catcode`\_=\active
  \catcode`<=\active
  \catcode`>=\active
  \def/{\raisebox{.667ex}{\anaclasis}\kern -.1em\relax}%
  \def_{%
    \raisebox{-.5ex}[\z@][\z@]{$\scriptscriptstyle\wedge$}%
  }%
  \def:{%
    \raisebox{-.02ex}{%
      \begingroup
      \M@cmr
      \kern .1em \char95 \kern -.1em \char95 
      \endgroup
    }%
  }%
  \def\D{$\delta$\kern -\dimen1\relax}%
  \def\d{$\delta$}%
  \def\s{$\int$}%
  \def\+{%
    \kern .056em
    \raisebox{.667ex}[\z@][\z@]{$\scriptscriptstyle+$}%
  }%
  \def<{\kern -\dimen1\relax}%
  \def>{\kern \dimen1\relax}%
%    \end{macrocode}
%
% |\S| has a slightly different definition from that of |\metra|.
%    \begin{macrocode}
  \def\S{\M@super@sigla}%
  \def\charcolon{\char"3A}%
  \def\charslash{\char"2F}%
%    \end{macrocode}
%
% We chain to another macro so that the active characters within the
% argument will be interpreted according to the definitions just given.
%    \begin{macrocode}
  \M@sigla
}
\endgroup
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\M@sigla}[2][\relax]{%
  \ifx n#1\relax
  \else
    \ifx N#1\relax
    \else
      \ifx \relax#1\relax
        \def\c{\metra{\c}}%
        \def\C{\metra{\C}}%
        \def\cc{\metra{\cc}}%
        \def\Cc{\metra{\Cc}}%
        \def\ccc{\metra{\ccc}}%
        \def\Ccc{\metra{\Ccc}}%
        \def\p{\metra{\p}}%
        \def\pp{\metra{\pp}}%
        \def\Pp{\metra{\Pp}}%
        \def\ppp{\metra{\ppp}}%
        \def\Ppp{\metra{\Ppp}}%
        \def\pppp{\metra{\pppp}}%
        \def\Pppp{\metra{\Pppp}}%
        \def\ppppp{\metra{\ppppp}}%
        \def\Ppppp{\metra{\Ppppp}}%
        \def\pxp{\metra{\pxp}}%
        \def\Pxp{\metra{\Pxp}}%
        \def\x{\metra{\x}\kern 3\dimen1\relax}%
        \let\r=\respondens
        \M@dim@c@ext=.36em
        \M@dim@c@int=.12em
        \M@dim@c@Ext=.5\M@dim@c@int
      \else
        \PackageError{metre}{%
          Invalid optional parameter for \protect\sigla}%
        {The optional parameter must be either `n' or `N'}%
      \fi
    \fi
  \fi
  \bgroup \leavevmode \M@facies #2\/\egroup \endgroup}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\M@super@sigla}[2][0]{%
  \begingroup
  \dimen0 =.75ex
  \advance \dimen0 by #1ex 
  \dimen1 = 1em
  \relsize{-4}%
  \expandafter\M@super@sigla@check@it\f@shape\end
  \raise \dimen0 \hbox{#2}%
  \endgroup
}
%    \end{macrocode}
%
% Check whether the parameter is to be set in italics.
%
%    \begin{macrocode}
\def\M@super@sigla@check@it#1#2\end{%
  \kern .05\dimen1 
  \if i#1\relax
    \if t#2\relax
      \kern .05\dimen1\relax 
    \fi
  \fi
}
%    \end{macrocode}
%
% \subsection{Other signs} 
%
% \subsubsection{Brackets} 
%
%    \begin{macrocode}
\newcommand{\quadras}{\leavevmode \raise .16ex
  \hbox{$\scriptstyle\lbrack\mskip-\thinmuskip\lbrack$}}
\newcommand{\Quadras}{\leavevmode
  $\textstyle\lbrack\mskip-\thinmuskip\lbrack$}
\newcommand{\quadrad}{\leavevmode \raise .16ex
  \hbox{$\scriptstyle\rbrack\mskip-\thinmuskip\rbrack$}}
\newcommand{\Quadrad}{\leavevmode
  $\textstyle\rbrack\mskip-\thinmuskip\rbrack$}
\newcommand{\angus}{\leavevmode
  \raise .16ex\hbox{$\scriptstyle\langle$}}
\newcommand{\Angus}{\leavevmode $\textstyle\langle$}
\newcommand{\angud}{\leavevmode
   \raise .16ex\hbox{$\scriptstyle\rangle$}}
\newcommand{\Angud}{\leavevmode $\textstyle\rangle$}
\newcommand{\crux}{\leavevmode
  \bgroup\M@cmr\textdagger\egroup}
\newcommand{\Crux}{\leavevmode
  \bgroup\M@cmr\relsize{1}\textdagger\egroup}
\newcommand{\alas}{\leavevmode \bgroup\M@cmr\{\egroup}
\newcommand{\Alas}{\leavevmode
  \bgroup\M@cmr\relsize{1}\{\egroup}
\newcommand{\alad}{\leavevmode \bgroup\M@cmr\}\egroup}
\newcommand{\Alad}{\leavevmode
  \bgroup\M@cmr\relsize{1}\}\egroup}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\semi}[1]{%
  \ifx [#1\relax \M@semi@lb 
  \else
    \ifx ]#1\relax \M@semi@rb
    \else
      \PackageError{metre}{Invalid argument for \protect\semi}%
      {\protect\semi must be followed by \lbrack or \rbrack}%
    \fi
  \fi
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@semi@lb{\leavevmode
  \setbox0=\hbox{o}%
  \setbox0=\hbox to .67\wd0{%
    \hss
    \vrule height .5ex width .5pt depth .5ex 
    \lower .5ex \hbox to .6ex{%
       \leaders\hrule height .4pt\hfill}%
  }%
  \box0\relax 
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@semi@rb{\leavevmode
  \setbox0=\hbox{o}%
  \setbox0=\hbox to .67\wd0{%
    \lower .5ex \hbox to .6ex{%
      \leaders\hrule height .4pt\hfill}%
    \vrule height .5ex width .5pt depth .5ex
    \hss
  }%
  \box0\relax 
}
%    \end{macrocode}
%
% \subsubsection{Special symbols} 
%
% \paragraph{anaclasis}
%
%    \begin{macrocode}
\newcommand{\anaclasis}[1][0]{\M@anaclasis0{#1}}
\newcommand{\Anaclasis}[1][0]{\M@anaclasis1{#1}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@anaclasis#1#2{\leavevmode
  \setbox0=\hbox{$\ifnum #1=\z@
                    \scriptscriptstyle
                  \else
                    \scriptstyle
                  \fi
                  \div$}%
  \dimen0=\ifnum #1=\z@ .215\else .105\fi ex
  \advance \dimen0  by #2ex
  \raisebox {\dimen0}[\z@][\z@]{\box0}%
}
%    \end{macrocode}
%
% \paragraph{antisigma}
%
%    \begin{macrocode}
\newcommand{\antisigma}[1][0]{\M@antisigma0{#1}}
\newcommand{\Antisigma}[1][0]{\M@antisigma1{#1}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@antisigma#1#2{\leavevmode
  \setbox0=\hbox{$\ifnum #1=\z@
                    \scriptscriptstyle
                  \else
                    \scriptstyle
                  \fi
                  \supset$}%
  \dimen0=\ifnum #1=\z@ .19\else .105\fi ex
  \advance \dimen0 by #2ex
  \raisebox {\dimen0}[\z@][\z@]{\box0}%
}
%    \end{macrocode}
%
% \paragraph{asteriscus}
%
%    \begin{macrocode}
\newcommand{\asteriscus}[1][0]{\M@aster0{#1}}
\let\asteriskos=\asteriscus
\newcommand{\Asteriscus}[1][0]{\M@aster1{#1}}
\let\Asteriskos=\Asteriscus
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@aster#1#2{\leavevmode
  \dimen1=1ex
  \begingroup
  \relsize {\ifnum #1=\z@ 1\else 2\fi}%
  \setbox0=\hbox{$\times$}%
  \setbox1=\hbox{$\cdot$}%
  \ht0=.82\ht0 
  \setbox2=\hbox to .675\wd0{%
    \hss
    \copy0 
    \kern -\wd0  
    \rlap{\kern .1\wd0   \raise 0\ht0    \copy1}%
    \rlap{\kern .32\wd0 \raise .35\ht0  \copy1}%
    \rlap{\kern \ifnum #1=\z@ .55 \else .525\fi \wd0
          \raise 0\ht0 \copy1}%
    \rlap{\kern .32\wd0 \raise -.35\ht0 \copy1}%
    \kern \wd0
    \hss
  }%
  \dimen0=-\ifnum #1=\z@ .1\else .2\fi\dimen1
  \advance \dimen0 by #2\dimen1
  \raisebox {\dimen0}[\z@][\z@]{\box2}%
  \endgroup
}
%    \end{macrocode}
%
% \paragraph{catalexis}
%
%    \begin{macrocode}
\newcommand{\catalexis}[1][0]{\M@catalexis 0{#1}}
\newcommand{\Catalexis}[1][0]{\M@catalexis 1{#1}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@catalexis#1#2{\leavevmode
  \setbox0=\hbox{$\ifnum #1=\z@
                    \scriptscriptstyle
                  \else
                    \scriptstyle
                  \fi
                  \wedge$}%
  \kern -.05\wd0
  \dimen0=-\ifnum #1=\z@ .22\else .45\fi ex
  \advance \dimen0 by #2ex
  \raisebox {\dimen0}[\z@][\z@]{\box0}%
  \kern .05\wd0\relax  
}
%    \end{macrocode}
% \paragraph{diple}
%
%    \begin{macrocode}
\newcommand{\diple}{%
  \@ifstar{\M@starredtrue\M@bigfalse\M@diple}%
          {\M@starredfalse\M@bigfalse\M@diple}}
\newcommand{\Diple}{%
  \@ifstar{\M@starredtrue\M@bigtrue\M@diple}%
          {\M@starredfalse\M@bigtrue\M@diple}}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\M@diple}[1][0]{\leavevmode 
  \setbox0=\hbox{%
    $\ifM@big \textstyle \else \scriptstyle \fi>$}%
  \dimen0=\ifM@big -.05 \else .1 \fi ex
  \dimen1=#1ex
  \advance \dimen1 by \dimen0
  \raisebox {\dimen1}[\z@][\z@]{\copy0}%
  \ifM@starred   
    \ifM@big 
      \kern -.25\wd0 \dimen0=.55\ht0
    \else
      \kern -.2\wd0  \dimen0=.45\ht0
    \fi
    \advance \dimen0 by \dimen1
    \raisebox {\dimen0}[\z@][\z@]%
      {\hbox to 0pt{\hss $\scriptstyle\cdot$}}%
    \dimen0=\ifM@big -.275 \else -.475 \fi \ht0
    \advance \dimen0 by \dimen1
    \raisebox {\dimen0}[\z@][\z@]%
      {\hbox to 0pt{\hss $\scriptstyle\cdot$}}%
    \kern \ifM@big .25 \else .2 \fi \wd0
  \fi
}
%    \end{macrocode}
%
% \paragraph{antidiple}
%
%    \begin{macrocode}
\newcommand{\antidiple}{%
  \@ifstar{\M@starredtrue\M@bigfalse\M@antidiple}%
          {\M@starredfalse\M@bigfalse\M@antidiple}}
\newcommand{\Antidiple}{%
  \@ifstar{\M@starredtrue\M@bigtrue\M@antidiple}%
          {\M@starredfalse\M@bigtrue\M@antidiple}}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\M@antidiple}[1][0]{\leavevmode 
  \setbox0=\hbox{%
    $\ifM@big \textstyle \else \scriptstyle \fi<$}%
  \dimen0=\ifM@big -.05 \else .1 \fi ex
  \dimen1=#1ex
  \advance \dimen1 by \dimen0
  \raisebox {\dimen1}[\z@][\z@]{\copy0}%
  \ifM@starred   
    \ifM@big 
      \kern -.5\wd0
      \dimen0=.55\ht0
    \else
      \kern -.45\wd0
      \dimen0=.45\ht0
    \fi
    \advance \dimen0 by \dimen1
    \raisebox {\dimen0}[\z@][\z@]%
      {\hbox to 0pt{\hss $\scriptstyle\cdot$}}%
    \dimen0=\ifM@big -.325 \else -.5 \fi \ht0
    \advance \dimen0 by \dimen1
    \raisebox {\dimen0}[\z@][\z@]%
      {\hbox to 0pt{\hss $\scriptstyle\cdot$}}%
    \kern \ifM@big .5 \else .45 \fi \wd0
  \fi
}
%    \end{macrocode}
%
% \paragraph{obelus}
%
%    \begin{macrocode}
\newcommand{\obelus}{%
  \@ifstar{\M@starredtrue\M@bigfalse\M@obelus}%
          {\M@starredfalse\M@bigfalse\M@obelus}}
\let\obelos=\obelus
\newcommand{\Obelus}{%
  \@ifstar{\M@starredtrue\M@bigtrue\M@obelus}%
          {\M@starredfalse\M@bigtrue\M@obelus}}
\let\Obelos=\Obelus
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\M@obelus}[1][0]{\leavevmode 
    \setbox0=\hbox to 
      \ifM@big
        \ifM@starred 1 \else 1.5 \fi
      \else
        \ifM@starred .89 \else 1.33 \fi
      \fi em
      {\leaders \hrule height .33pt\hfill}%
    \setbox1=\hbox{$\cdot$}%
    \ifM@starred
       \setbox0=\hbox{%
         \copy0 
         \dimen0=\wd0
         \advance \dimen0 by \wd1
         \divide \dimen0 by 2
         \kern -\dimen0
         \rlap{\lower .1ex \copy1}%
         \rlap{\lower 1ex \copy1}%
         \kern \dimen0
       }%
    \fi
    \dimen0=.48ex
    \advance \dimen0 by #1ex
    \raisebox {\dimen0}[\z@][\z@]{\box0}%
}
%    \end{macrocode}
%
% \paragraph{respondens}
%
%    \begin{macrocode}
\newcommand{\respondens}{\M@bigfalse\M@respondens}
\newcommand{\Respondens}{\M@bigtrue\M@respondens}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\M@respondens}[1][0]{\leavevmode
  \setbox0=\hbox{%
    $\ifM@big \textstyle \else \scriptstyle \fi \sim$}%
  \dimen0=\ifM@big -.05 \else .1 \fi ex
  \advance \dimen0 by #1ex
  \kern .067em
  \raisebox {\dimen0}[\z@][\z@]{\box0}%
}
%    \end{macrocode}
%
% \paragraph{terminus}
%
%    \begin{macrocode}
\newcommand{\terminus}{%
  \@ifstar{\M@starredtrue\M@bigfalse\M@terminus}%
          {\M@starredfalse\M@bigfalse\M@terminus}}
\newcommand{\Terminus}{%
  \@ifstar{\M@starredtrue\M@bigtrue\M@terminus}%
          {\M@starredfalse\M@bigtrue\M@terminus}}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\M@terminus}[1][0]{\leavevmode
  \setbox0=\hbox{%
    $\ifM@big \textstyle \else \scriptstyle \fi
     \ifM@starred \oplus \else \otimes \fi$}%
  \dimen0=\ifM@big -.1 \else .1 \fi ex
  \advance \dimen0 by #1ex
  \raisebox {\dimen0}[\z@][\z@]{\box0}%
}
%    \end{macrocode}
%
% \paragraph{margini}
%
%    \begin{macrocode}
\newcommand{\margini}{%
  \@ifstar{\M@margini@star}{\M@margini@nostar}}
\newcommand{\M@margini@star}[2][0pt]{\M@margini{1}{#1}{#2}}
\newcommand{\M@margini@nostar}[2][0pt]{\M@margini{0}{#1}{#2}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@margini#1#2#3{\leavevmode
  \setbox1=\hbox{#3}%
  \strut
  \vadjust{%
    \kern -\dp\strutbox
    \ifnum #1=\@ne
      \hfill
    \fi
    \dimen0=1em
    \advance \dimen0 by #2\relax
    \vtop to \dp\strutbox{%
      \baselineskip\dp\strutbox
      \vss
      \ifnum #1=\@ne   
        \rlap{\kern \dimen0\copy1}%
      \else
        \llap{\copy1\kern \dimen0}%
      \fi
      \null
    }%
  }%
  \ignorespaces
}
%    \end{macrocode}
%
% \newpage
%
% \subsubsection{Diacritics} 
%
% \paragraph{accents}
%
%    \begin{macrocode}
\newcommand{\acutus}[2][0]{\M@movable@accent{#1}{#2}{19}}
\newcommand{\gravis}[2][0]{\M@movable@accent{#1}{#2}{18}}
\newcommand{\macron}[2][0]{\M@movable@accent{#1}{#2}{22}}
\edef\Breve{\breve}
\renewcommand{\breve}[2][0]{\M@movable@accent{#1}{#2}{21}}
\newcommand{\circumflexus}[2][0]{\M@movable@accent{#1}{#2}{126}}
\newcommand{\diaeresis}[2][0]{\M@movable@accent{#1}{#2}{127}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@movable@accent#1#2#3{\leavevmode
  \begingroup
  \setbox0=\hbox{#2}%
  \copy0
  \kern -\wd0 
  \dimen0 = \ht0
  \ifdim \dimen0=\z@ 
      \dimen0=1ex
  \fi
  \advance \dimen0 by -1ex
  \advance \dimen0 by #1ex
  \raise \dimen0 
    \hbox to \wd0{%
      \hss \begingroup \M@cmr \char#3 \endgroup \hss}%
  \endgroup
}
%    \end{macrocode}
%
% \paragraph{cons}
%
%    \begin{macrocode}
\newcommand{\cons}[1]{%
  \setbox0=\hbox{#1}%
  \copy0 
  \kern -\wd0 
%    \end{macrocode}
%
% The quarter-circles are taken from the \LaTeX{} \texttt{circle} font.
%
%    \begin{macrocode}
  \setbox1=\hbox{\hss\begingroup\tencirc\char3\char0\endgroup}%
  \setbox1=\hbox to \wd0{\hss\kern .5\wd1\box1\hss}%
  \dimen0=-.5\ht1 
  \ifdim \z@<\dp0 
    \advance \dimen0 by -.5\dp0 
  \fi
  \raise \dimen0 \box1\relax
}
%    \end{macrocode}
%
% \paragraph{dubia}
%
%    \begin{macrocode}
\newcommand{\dubia}{\@ifstar{\M@dubia@star}{\M@dubia}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@dubia@star#1{\M@dubia@ibycus{#1}}
\def\M@dubia#1{\leavevmode
  \setbox0=\hbox{[}%
  \dimen0=\dp0 
  \setbox0=\hbox{#1}%
  \ifdim \dp0=\z@ 
     \dimen2=-.5ex
  \else
    \dimen2=-1.75\dimen0 
  \fi
  \setbox1=\hbox{\bgroup \M@cmr .\egroup}%
  \dimen3=\z@
  \M@Stack 0\relax
}
\def\M@dubia@ibycus#1{\leavevmode
  \ifnum \M@ibycus=\@ne
    #1!%
  \else
    \PackageError{metre}{\protect\dubia* requires ibycus4}{}%
  \fi
}
%    \end{macrocode}
%
% \paragraph{dubiae}
%
%    \begin{macrocode}
\newcommand{\dubiae}{\@ifstar{\M@dubiae@star}{\M@dubiae@nostar}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@dubiae@star#1{\expandafter\M@dubiae@ibycus#1\end}
\def\M@dubiae@nostar#1{\M@dubiae#1\end}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@dubiae#1{\leavevmode
  \let\next=\M@dubiae
  \ifx #1\end
     \let\next=\relax
  \else
     \ifx #1\positio
       #1\relax \else
     \ifx #1\Positio
       #1\relax \else
     \ifx #1\pos
       #1\relax \else
     \ifx #1\Pos
       #1\relax 
     \else
       \setbox0=\hbox{[}%
       \dimen0=\dp0 
       \setbox0=\hbox{#1}%
       \ifdim \dp0=\z@ 
         \dimen2=-.5ex
       \else
         \dimen2=-1.75\dimen0 
       \fi
       \setbox1=\hbox{\bgroup \M@cmr .\egroup}%
       \dimen3=\z@
       \M@Stack 0\relax 
    \fi\fi\fi\fi
  \fi
  \next
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@dubiae@ibycus#1{\leavevmode
  \ifx #1\end
     \let\next=\relax
  \else
    \ifnum \M@ibycus=\z@
      \PackageError{metre}{\protect\dubiae* requires ibycus4}{}%
    \fi
    \ifx #1\positio #1\relax \else
    \ifx #1\Positio #1\relax \else
    \ifx #1\pos #1\relax \else
    \ifx #1\Pos #1\relax \else
      #1!\relax
    \fi\fi\fi\fi
    \let\next=\M@dubiae@ibycus
  \fi
  \next
}
%    \end{macrocode}
%
% \paragraph{erasa}
%
%    \begin{macrocode}
\newcommand{\erasa}[1][1]{\leavevmode
  \@tempcnta=#1\relax
  \@whilenum \@tempcnta>\z@ \do
    {\M@erasa \advance \@tempcnta by \m@ne}%
}
\def\M@erasa{%
  \setbox0=\hbox{\vrule width .025em depth .4ex height 1.5ex}%
  \kern .125em
  \copy0  \kern .125em
  \copy0  \kern .125em
  \copy0  \kern .115em\relax
}
%    \end{macrocode}
% 
% \paragraph{positio}
%
%    \begin{macrocode}
\newcommand{\positio}{\leavevmode
 \raise .85ex \hbox{\vrule width .02em depth \z@ height .75ex}%
}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\Positio}{\leavevmode
  \raise .75ex \hbox{\vrule width .02em depth \z@ height .94ex}%
}
%    \end{macrocode}
%
% \paragraph{punctum}
%
%    \begin{macrocode}
\newcommand{\punctum}{\@ifnextchar[{\M@punctum}{\M@punctum[1]}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@punctum[#1]{\leavevmode
  \@tempcnta=#1\relax
  \@whilenum \@tempcnta>\z@ \do
    {\M@@punctum \advance \@tempcnta by \m@ne}%
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@punctum{%
  \setbox0=\hbox{[}%
  \setbox1=\hbox to .5em{\hss \bgroup \M@cmr .\egroup \hss}%
  \lower .9\dp0 \box1\relax
}
%    \end{macrocode}
%
% \paragraph{Punctum}
%
%    \begin{macrocode}
\newcommand{\Punctum}{\@ifnextchar[{\M@Punctum}{\M@Punctum[1]}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@Punctum[#1]{\leavevmode
  \@tempcnta=#1\relax 
  \@whilenum \@tempcnta>\z@ \do
    {\M@@Punctum \advance \@tempcnta by \m@ne}%
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@@Punctum{%
  \setbox0=\hbox{[}%
  \setbox1=\hbox{%
    \begingroup \M@cmr
    {\relsize{-4}\hbox{(}\kern -.15em}%
    .%
    {\relsize{-4}\kern -.15em\hbox{)}}%
    \endgroup
  }%
  \lower .9\dp0 \copy1\relax
}
%    \end{macrocode}
%
% \subsubsection{Ties}
%
%    \begin{macrocode}
\newcommand{\tie}{\@ifstar\M@tie@star\M@tie@nostar}
\newcommand{\itie}{\@ifstar\M@itie@star\M@itie@nostar}
\newcommand{\M@tie@star}[2][1]{\M@tie{#2}{0}{1}{#1}}
\newcommand{\M@tie@nostar}[2][1]{\M@tie{#2}{0}{0}{#1}}
\newcommand{\M@itie@star}[2][1]{\M@tie{#2}{1}{0}{#1}}
\newcommand{\M@itie@nostar}[2][1]{\M@tie{#2}{1}{1}{#1}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@tie#1#2#3#4{%
%    \end{macrocode}
%
%  |#1|   the text above/below which the tie should go\\
%  |#2|  0 = |tie| ($\frown$), 1 =  |itie| ($\smile$)\\
%  |#3|  0 = above, 1 = below\\
%  |#4|  scale factor for the text width
%    \begin{macrocode}
  \leavevmode
  \setbox0=\hbox{#1}%
  \ifnum \M@metra=\@ne
    \global\M@dim@sunk=\z@
  \fi
  \dimen3=\z@
  \ifM@inter
    \dimen3=\M@interS\M@dim@m%
  \fi
  \ifdim \ht0=\z@ %      tie over space
    \ifdim \z@=\dp0 
      \ht0=1ex
    \fi
  \fi
  \dimen0=#4\wd0 
  \ifnum \M@metra=\@ne
    \dimen0=.6\dimen0 
  \fi
  \begingroup
%    \end{macrocode}
%
% We step through the available font sizes until we find a symbol
% long enough to fit the text.
%
%    \begin{macrocode}
  \relsize{-10}%
  \wd1=\z@
  \@whiledim \wd1<.95\dimen0 \do{%
    \ifx \@currsize \Huge
      \dimen0=\z@
    \else
      $%
      \dimen1=\f@baselineskip
      \fontencoding{OML}\fontfamily{cmm}\fontseries{m}%
      \fontshape{it}\fontsize{\ssf@size}{\dimen1}\selectfont
      \global\setbox1=\hbox{%
        \hss\symbol{"5\ifnum 0=#2F\else E\fi}\hss}%
      \ifdim \wd1<\dimen0 
        \fontsize{\sf@size}{\dimen1}\selectfont
        \global\setbox1=\hbox{%
          \hss\symbol{"5\ifnum 0=#2F\else E\fi}\hss}%
        \ifdim \wd1<\dimen0 
          \fontsize{\tf@size}{\dimen1}\selectfont
          \global\setbox1=\hbox{%
            \hss\symbol{"5\ifnum 0=#2F\else E\fi}\hss}%
        \fi
      \fi
      $%
    \fi
    \ifdim \wd1<\dimen0 
      \relsize{+1}%
    \fi
    \global\dimen4=\fontdimen5\the\font
  }%
  \endgroup
  \ifnum #3=\z@
    \dimen2=1.067\ht0 
    \divide \dimen4 by 2
    \advance \dimen4 by -\ht1
    \advance \dimen2 by .6\dimen4
  \else
    \dimen2=-1.05\ht1
    \advance \dimen2 by -.75pt
  \fi
  \ifnum #3=\@ne
    \ifdim \z@<\dp0 
      \advance \dimen2 by -1\dp0 
    \fi
  \fi
  \ifnum \M@metra=\@ne
    \advance \dimen2 by -\M@dim@sunk
  \fi
  \M@Stack 0\relax
}
%    \end{macrocode}
%
% \newpage
%
% \subsubsection{Interlinear signs} 
%
% \paragraph{linea}
%
%    \begin{macrocode}
\newcommand{\M@linea@star}[1][0]{\M@linea{1}{#1\baselineskip}}
\newcommand{\M@linea@nostar}[1][0]{\M@linea{0}{#1\baselineskip}}
%    \end{macrocode}
% The actual |\linea| command is defined by means of |\novalinea|
% at the end of this section.
%    \begin{macrocode}
\def\M@linea#1#2{%
%    \end{macrocode}
%  |#1| is 1 for the \texttt{*}-form, 0 for the normal form;\\
%  |#2| is the additional |\baselineskip| increment.\\
%  |\dimen1| is the displacement from the text margin;\\
%  |\dimen2| is the length of the line;\\
%  |\dimen3| is the |\baselineskip| increment
%    \begin{macrocode}
  \leavevmode 
  \let\next=\relax
  \ifnum #1=\@ne 
    \let\next=\@gobble
  \fi
  \global\M@linea@length=\dimen2 
  \dimen0=.75\baselineskip
  \ifM@imago
    \advance \dimen0 by #2\relax
    \global\M@linea@indent=\z@
  \else
    \advance \dimen3 by #2\relax
    \vadjust{\kern \dimen3}%
    \ifnum #1=\@ne
      \par
    \else 
      \\%
    \fi
    \leavevmode
    \kern \dimen1 
    \global\M@linea@indent=\dimen1 
  \fi
  \raisebox {\dimen0}[\z@][\z@]%
    {\hbox to \dimen2{\leaders\hrule\hfill}}%
  \global\M@linea@height=\dimen0 
  \ifM@imago
  \else
    \dimen0=\dimen2 
    \advance \dimen0 by \dimen1 
    \kern -\dimen0 
  \fi
  \if \M@before@linea\relax
  \else
    \expandafter\M@@before@linea\M@before@linea
  \fi
  \next
}
%    \end{macrocode}
%
% \paragraph{geminata} 
%
%    \begin{macrocode}
\newcommand{\geminata}{%
  \@ifstar{\M@geminata@star}{\M@geminata@nostar}}
\newcommand{\M@geminata@star}[1][0]%
  {\M@geminata{1}{#1\baselineskip}}
\newcommand{\M@geminata@nostar}[1][0]%
  {\M@geminata{0}{#1\baselineskip}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@geminata#1#2{%
%    \end{macrocode}
%  |#1|:  1 for the \texttt{*}-form, 2 for the normal form;\\
%  |#2|: the additional displacement from the preceding line\\
%  |\dimen1| is the displacement from the text margin;\\
%  |\dimen2| is the length;\\
%  |\dimen3| is the |\baselineskip| increment
%    \begin{macrocode}
  \leavevmode
  \M@linea@dimentrue \linea \M@linea@dimenfalse
  \let\next=\relax
  \ifnum #1=\@ne \let\next=\@gobble \fi
  \dimen0=.75\baselineskip
  \ifM@imago
    \advance \dimen0 by #2\relax
  \else
    \advance \dimen3 by #2\relax
    \vadjust{\kern \dimen3}%
    \ifnum #1=\@ne \par \else \\\fi
    \leavevmode
    \kern \dimen1 
  \fi
  \raisebox {\dimen0}[\z@][\z@]%
    {\hbox to \dimen2{\leaders\hrule\hfill}}%
  \kern -\dimen2 
  \advance \dimen0 by -.075\baselineskip
  \global\M@linea@height=\dimen0 
  \advance \dimen0 by -.075\baselineskip
  \raisebox {\dimen0}[\z@][\z@]%
    {\hbox to \dimen2{\leaders\hrule\hfill}}%
  \ifM@imago
  \else
    \dimen0=\dimen2 
    \advance \dimen0 by \dimen1 
    \kern -\dimen0 
  \fi
  \next
}
%    \end{macrocode}
%
% \paragraph{bifida}
%
%    \begin{macrocode}
\newcommand{\bifida}{\def\M@before@linea{0}\linea}
\let\lineabifida=\bifida
\newcommand{\Bifida}{\def\M@before@linea{1}\linea}
\let\Lineabifida=\Bifida
\newcommand{\lunata}{\def\M@before@linea{2}\linea}
\let\linealunata=\lunata
\newcommand{\Lunata}{\def\M@before@linea{3}\linea}
\let\Linealunata=\Lunata
%    \end{macrocode}
% Place |>| or |(| in front of |\linea|
%    \begin{macrocode}
\def\M@@before@linea#1{%
  \leavevmode 
  \begingroup
  \M@cmr
  \ifM@imago
    \dimen0=-\M@linea@length
  \else
    \dimen0=\M@linea@indent
  \fi
  \dimen1=\M@linea@height
  \ifcase #1\relax
    \setbox0=\hbox{$\scriptscriptstyle>$}%
    \ifcase \@ptsize
      \advance \dimen1 by -.327\ht0 
      \dimen2=-.785\wd0 
    \or
      \advance \dimen1 by -.357\ht0 
      \dimen2=-.78\wd0 
    \or
      \advance \dimen1 by -.33\ht0 
      \dimen2=-.78\wd0 
    \fi
  \or
    \setbox0=\hbox{$\scriptstyle>$}%
    \ifcase \@ptsize
      \advance \dimen1 by -.357\ht0 
      \dimen2=-.81\wd0 
    \or
      \advance \dimen1 by -.405\ht0 
      \dimen2=-.78\wd0 
    \or
      \advance \dimen1 by -.395\ht0 
      \dimen2=-.78\wd0 
    \fi
  \or
    \setbox0=\hbox{)}%
    \dimen2=-.725\wd0 
    \advance \dimen1 by -.28\ht0 
  \or
    \setbox0=\hbox{\bgroup \relsize{+1})\egroup}%
    \dimen2=-.6\wd0 
    \advance \dimen1 by -.28\ht0 
  \fi
  \kern \dimen0   \kern \dimen2 
  \ifM@imago
  \else
    \global\advance\M@linea@indent by \dimen2 
  \fi
  \global\advance \M@linea@length by -\dimen2 
  \raisebox {\dimen1}[\z@][\z@]{\copy0}%
  \advance \dimen2 by \wd0 
  \kern -\dimen0 
  \kern -\dimen2 
  \endgroup
  \def\M@before@linea{\relax}%
}                          
%    \end{macrocode}
%
% \paragraph{antelineam and postlineam}
%
%    \begin{macrocode}
\newcommand{\antelineam}{\M@adlineam{0}}
\newcommand{\postlineam}{\M@adlineam{1}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@adlineam#1#2{\leavevmode 
  \setbox0=\hbox{\hss
    \bgroup #2\relax \global\dimen0=-.5ex \egroup \hss}%
  \kern \M@linea@indent
  \ifnum #1=\z@ 
     \kern -\wd0 
  \else
     \kern \M@linea@length
  \fi
  \advance \dimen0 by \M@linea@height
  \raisebox {\dimen0}[\z@][\z@]{\copy0}%
  \kern -\M@linea@indent
  \ifnum #1=\z@ 
  \else
     \kern -\wd0 
     \kern -\M@linea@length
  \fi
}
%    \end{macrocode}
%
% \paragraph{coronis}
%
%    \begin{macrocode}
\newcommand{\coronis}{%
  \@ifstar{\M@coronis@star}{\M@coronis@nostar}}
\let\koronis=\coronis
\newcommand{\M@coronis@star}[1][0]%
  {\M@coronis{1}{#1\baselineskip}}
\newcommand{\M@coronis@nostar}[1][0]%
  {\M@coronis{0}{#1\baselineskip}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@coronis#1#2{\leavevmode
  \let\next=\relax
  \begingroup 
    \normalsize 
    \global\dimen2=\baselineskip 
  \endgroup
  \ifcase \@ptsize
    \dimen0=.67em 
  \or
    \dimen0=.7em 
  \or
    \dimen0=.65em
  \fi
  \ifM@imago
    \dimen3=\z@
    \advance \dimen3 by #2\relax
  \else
    \ifnum #1=\@ne \let\next=\@gobble \fi
    \vadjust{\kern #2}%
    \ifnum #1=\@ne \par \else \\\fi
    \leavevmode 
    \kern -1.6\dimen0 
  \fi
  \dimen1=.75\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
%    \end{macrocode}
% The central line
%    \begin{macrocode}
  \raisebox {\dimen1}[\z@][\z@]%
    {\hbox to \dimen0{\leaders \hrule \hfill}}%
  \global\M@linea@length=\dimen0 
  \global\M@linea@height=\dimen1 
  \kern -\dimen0 
%    \end{macrocode}
% The lines above
%    \begin{macrocode}
  \dimen1=\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[0pt][0pt]%
    {\hbox to \dimen0{%
     \hss \hbox to .6\dimen0{\leaders \hrule \hfill}\hss}}%
  \kern -\dimen0 
  \dimen1=1.1\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[0pt][0pt]%
    {\hbox to \dimen0{%
      \hss \hbox to .4\dimen0{\leaders \hrule \hfill}\hss}}%
  \kern -\dimen0 
  \dimen1=1.2\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[\z@][\z@]%
    {\hbox to \dimen0{%
      \hss\hbox to .25\dimen0{\leaders \hrule \hfill}\hss}}%
  \kern -\dimen0 
%    \end{macrocode}
% The lines below
%    \begin{macrocode}
  \dimen1=\if \@ptsize 2 .375\else .35\fi\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[\z@][\z@]%
    {\hbox to \dimen0{%
      \hss \hbox to .6\dimen0{\leaders \hrule \hfill}\hss}}%
  \kern -\dimen0 
  \dimen1=\if \@ptsize 2 .275\else .25\fi\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[0pt][0pt]%
    {\hbox to \dimen0{%
     \hss \hbox to .4\dimen0{\leaders \hrule \hfill}\hss}}%
  \kern -\dimen0 
  \dimen1=\if \@ptsize 2 .175\else .15\fi\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[\z@][\z@]%
    {\hbox to \dimen0{%
     \hss \hbox to .25\dimen0{\leaders \hrule \hfill}\hss}}%
  \kern -\dimen0 
%    \end{macrocode}
% The bottom squiggle
%    \begin{macrocode}
  \setbox0=\hbox{\begingroup
    \fontencoding{OT1}\fontfamily{cmr}\fontseries{m}%
    \fontshape{it}\selectfont ,\endgroup}%
  \dimen1=\if \@ptsize 2 0\else -.03\fi\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[\z@][\z@]%
    {\hbox to \dimen0{\hss \kern -.1\wd0\box0\hss}}%
  \kern -\dimen0 
%    \end{macrocode}
% The top squiggle
%    \begin{macrocode}
  \setbox0=\hbox{\begingroup
    \fontencoding{OT1}\fontfamily{cmr}\fontseries{m}%
    \fontshape{it}\selectfont \char'140 \endgroup}%
  \dimen1=.97\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[\z@][\z@]%
    {\hbox to \dimen0{\hss \kern -.5\wd0\box0\hss}}%
  \kern -\dimen0 
%    \end{macrocode}
% The small circle
%    \begin{macrocode}
  \setbox0=\hbox{\begingroup \tencirc \char"61 \endgroup}%
  \setbox0=\hbox{\begingroup
    \kern 1.1\wd0 \tencirc \char"61 \endgroup}%
  \dimen1=\if \@ptsize 2 .85\else .86\fi\dimen2 
  \ifM@imago \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[0pt][0pt]%
    {\hbox to \dimen0{\hss \box0 \hss}}%
  \kern -\dimen0 
%    \end{macrocode}
% The big circle
%    \begin{macrocode}
  \setbox0=\hbox{%
    \hss \begingroup \tencirc \char"63 \endgroup \hss}%
  \setbox0=\hbox{\hss \begingroup
    \kern 1.05\wd0 \tencirc \char"63 \endgroup \hss}%
  \dimen1=\if \@ptsize 2 .61\else .59\fi\dimen2 
  \ifM@imago  \advance \dimen1 by \dimen3 \fi
  \raisebox {\dimen1}[\z@][\z@]%
    {\hbox to \dimen0{\hss \box0 \hss}}%
  \ifM@imago
  \else
    \kern .6\dimen0 
  \fi
  \next
}
%    \end{macrocode}
% \paragraph{Generating the signs within the text}
%
%    \begin{macrocode}
\newcommand{\imago}{\@ifstar{\M@imago@star}{\M@imago@nostar}}
\newcommand{\M@imago@star}[2][0]{\M@imago{1}{#1}{#2}}
\newcommand{\M@imago@nostar}[2][0]{\M@imago{0}{#1}{#2}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@imago#1#2#3{\leavevmode
  \setbox0=\hbox{\begingroup \M@imagotrue {#3[#2]}\endgroup}%
  \setbox1=\hbox to \M@linea@length{%
    \hss
    \ifnum #1=\@ne
      \dimen0=\M@linea@height
      \advance \dimen0 by -.4ex
      \raisebox {-\dimen0}[\z@][\z@]{\box0}%
    \else
      \box0 
    \fi
  }%
  \box1\relax  
}
%    \end{macrocode}
% \paragraph{Defining new signs}
%
%    \begin{macrocode}
\newcommand{\novalinea}[4]{%
  \def#1{\leavevmode 
         \dimen1=#2\relax \dimen2=#3\relax
         \dimen3=#4\baselineskip 
         \ifM@linea@dimen
           \let\next=\relax
         \else
           \let\next=\M@do@linea
         \fi
         \next}%
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\M@do@linea{\@ifstar{\M@linea@star}{\M@linea@nostar}}
%    \end{macrocode}
%
%    \begin{macrocode}
\newcommand{\novageminata}[4]{%
  \def#1{\leavevmode 
         \dimen1=#2\relax \dimen2=#3\relax
         \dimen3=#4\baselineskip 
         \@ifstar{\M@geminata@star}{\M@geminata@nostar}}%
}
%    \end{macrocode}
%
%    \begin{macrocode}
\novalinea{\linea}{-.75em}{1.5em}{.15}
%    \end{macrocode}
% \subsubsection{\textit{Miscellanea}} 
%
% \paragraph{lineola}
%
%    \begin{macrocode}
\newcommand{\lineola}[2][0]{\leavevmode
  \dimen0=.75\baselineskip
  \advance \dimen0 by #1\baselineskip
  \raisebox {\dimen0}[\z@][\z@]%
    {\hbox to #2{\leaders \hrule \hfill}}%
  \kern -#2\relax
}
%    \end{macrocode}
%
% \paragraph{Lineola}
%
%    \begin{macrocode}
\newcommand{\Lineola}[2][0]{\leavevmode
  \setbox0=\hbox{#2}%
  \copy0 \kern -\wd0
  \lineola[#1]{\wd0}%
  \kern \wd0\relax
}
%    \end{macrocode}
%
% \paragraph{structa}
%
%    \begin{macrocode}
\newcommand{\structa}[3][0]{\leavevmode
  \setbox0=\hbox{\begingroup #2\endgroup}%
  \ifdim \ht0=\z@
    \ifdim \dp0=\z@
      \ht0=1ex
    \fi
  \fi
  \setbox1=\hbox to \wd0{\hss\begingroup #3\endgroup\hss}%
  \dimen2 = \ht0 
  \advance \dimen2 by .15ex
  \advance \dimen2 by #1ex
  \dimen3 = \z@
  \M@Stack 0\relax
}
%    \end{macrocode}
% \vspace{1ex}
% \quad
% \begin{metrica}
% \Large\t{.11}\textit{f\kern .05em\=in\-is}%
% \end{metrica}
%
%% \Finale
%
\endinput